Species: Acute willow, Salix spp.
Zone: Saskatchewan
At the greenhouse we propagate Acute Willow using cuttings. They are cut in the fall and stored in the freezer for the winter.
Seed Preparation:
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Shand Greenhouse Box 280 Estevan, Saskatchewan CANADA S4A 2A3
Phone: (306)-634-9771 Fax: (306)-634-6682 E-mail: greenhouse@saskpower.com
Species: Buffaloberry, Shepherdia argentea Nutt.
Zone: Grows only in the southern half of Saskatchewan.
Buffaloberry fruits are bright red and mature in August. They can be picked well into the winter, however you should be cautious of the large thorns present on these trees. Pick the berries when they are ripe and fill the pail with water in order to float off as much debris as possible. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Bur oak, Quercus macrocarpa Michx.
Zone: The black soil regions of the eastern part of Saskatchewan.
Oak acorns are a favourite winter food of bunnies, deer, and many other types of wildlife. As a result you need to start to gather them as soon as they fall in early September. Acorns can also be subject to weevils. If they are left too long they can also destroy the seed. As soon as the acorns are picked they should be floated in water. Those seeds that float are usually empty, inviable seeds and should be skimmed off and discarded. The ones that sink are more likely healthy. Acorns should enter stratification right away. Storage leads to drying out and loss of germination.
Species: Chokecherry, Prunus virginiana L. var. melanocarpa (A. Nels.) Sarg.
Zone: Performs best in the southern half of Saskatchewan.
Chokecherry forms clusters of crimson to black berry-like fruit. They usually mature in late summer. Pick the berries when they are ripe and fill the pails with water in order to float off as much debris as possible. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Colorado blue spruce, Picea pungens Engelm.
Zone: Performs best in the Southern half of Saskatchewan.
Blue spruce seed is produced in cones. Spruce cones are typically ready for harvest in late August through to early September. To ensure that they are ripe, you should pull a scale and look closely at the seed. It should be full, plump and white. You want to harvest cones whose scales are closed, not open. Once the cones are harvested they should be laid out in direct sun and allowed to open. Cones can be placed in a tray with a mesh bottom made of hardware cloth. As you shake the tray, the seeds will fall out through the holes in the cloth.
Species: Eastern red cedar, Juniperus virginiana
Zone: Will grow adequately throughout the province.
Juniper berries turn dark blue-purple with a whitish powdery coating when they are ripe. They typically ripen late in the fall. They can be harvested in the fall and into the winter. The longer you wait, however, the more competition there is with the wildlife. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Green ash, Fraxinus pennsylvanica Marsh. var subintegerrima (Vahl.) Fern.
Zone: Best suited to the southern half of Saskatchewan.
Green ash seeds typically look like a little set of wings. The seeds should be picked in the fall. The can be picked right from the tree, by laying a sheet under the tree and shaking the branches, or by picking up the seeds that have already fallen. You can break off the wings if you like, but it is not necessary. Seed should be stored at 10% moisture in a sealed container. Seed can be placed in either the refrigerator or the freezer.
Species: High-bush cranberry, Viburnum trilobum Marsh.
Zone: Grows in treed areas of the Parkland and transitions forests. Somewhat into the Boreal range.
High-bush cranberries turn an almost translucent bright orange-red when they are ripe. This usually happens in late summer and early fall. The berries will persist throughout the winter, but you will have to compete with the wildlife to get them. Pick the berries when they are ripe and fill the pail with water in order to float off as much debris as possible. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Jack pine, Pinus banksiana Lamb.
Zone: Performs best in the northern half of Saskatchewan.
Cones should be collected just as they are starting to crack open, do not wait too long or the seed will fall out. Cones need to be dried immediately after collection. Spread the cones out in thin layers in the sun or in a well ventilated room. Drying should happen slowly. It can take anywhere from 2-60 days. Getting the cones to open completely can be a tricky proposition. Some species may open completely with just air drying. The literature suggests 2-4 hours in a 65°C (150°F) kiln will open the cones of Jack Pine. If this does not work it may be that the initial drying did not allow for proper opening or the temperatures were too cool. You can soak the cones for 12-24 hours, and lay them out to dry again. Some people use a boiling water dip to open cones as well. Once you have successfully opened your cones, they can be placed in a tray with a mesh bottom made of hardware cloth. As you shake the tray, the seeds will fall out through the holes in the cloth. You can then dewing the seeds by rubbing. Seed can be stored in a sealed container in the freezer if the moisture content is less than 10%.
Species: Lodgepole pine, Pinus contorta Dougl. var. latifolia Engelm.
Zone: Black soil zones in central Saskatchewan. It will also perform adequately in the northern part of the province.
Cones should be collected just as they are starting to crack open, do not wait too long or the seed will fall out. Cones need to be dried immediately after collection. Spread the cones out in thin layers in the sun or in a well ventilated room. Drying should happen slowly. It can take anywhere from 2-60 days. Getting the cones to open completely can be a tricky proposition. Some species may open completely with just air drying. The literature suggests 96 hours in a 48°C (120°F) kiln will open the cones of Lodgepole Pine. If this does not work it may be that the initial drying did not allow for proper opening or the temperatures were too cool. You can soak the cones for 12-24 hours, and lay them out to dry again. Some people use a boiling water dip to open cones as well. Once you have successfully opened your cones, they can be placed in a tray with a mesh bottom made of hardware cloth. As you shake the tray, the seeds will fall out through the holes in the cloth. You can then dewing the seeds by rubbing. Seed can be stored in a sealed container in the freezer if the moisture content is less than 10%.
Species: Manitoba maple, Acer negundo L.
Zone: Grows best in southeast Saskatchewan
Maple seeds are called samaras and are formed in groups of two. They typically look like a little set of wings. The samaras should be picked in the fall. The can be picked right from the tree, by laying a sheet under the tree and shaking the branches, or by picking up the seeds that have already fallen. You can break off the wings if you like, but it is not necessary. Seed should be stored at 10% moisture in a sealed container. Seed can be placed in either the refrigerator or the freezer.
Species: Paper birch, Betula papyrifera Marsh.
Zone: Grows best in northern Saskatchewan. Tends to like sandy or silty loam soils.
Birch seed grows in nutlets which appear like tiny cones on the tree. These cones can be harvested after they start to turn brown. This is usually in September. Once the nutlets are harvested they should be laid out somewhere warm and allowed to dry out. The dry nutlets can be placed in a ice cream pail with a handful of small stones. Shake the pail until the seeds are knocked off the axis. The seed can then be sorted using screens of different sizes. Birch seed can be stored in a sealed container in your refrigerator.
Species: Pincherry, Prunus pensylvanica L.
Zone: Performs best in Central Saskatchewan
Pincherry produces clusters of small bright red berries. They usually ripen in late July – early August. Pick the berries when they are ripe and fill the pails with water in order to float off as much debris as possible. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Plains cottonwood, Populus deltoides Marsh.
Timing is very important on this species as the seed is released shortly after it matures. Seed pods form shortly after blooming in the spring. They appear like a small green cluster of tear drop shaped pods from a central axis. They usually mature in early June. You must watch them very closely as they should be picked just as they are starting to crack and not before. Once you start to see signs of splitting you need to pick the pods and spread them out in a box with mesh on all sides. This ensures good air flow. You may also want to add a fan. Once all the pods pop open your box will be full of white fuzz. An air compressor is handy to stir up the fuzz and release the remaining seed form the pods. Next you take a clean shop vac and suck up the fuzz through the mesh. The seed will fall to the bottom and the fuzz will stick to the filter. You may have to run the fuzz through more than one to get all the seed. The seed is extremely small and will look like sand in the bottom of your vacuum. We typically store the seed in paper envelopes in a sealed container with some desiccant. It can then be stored in the freezer.
Species: Potentilla, Potentilla fruticosa Auct.
Zone: Sandy soils in the South and South West.
The bright yellow flowers of the potentilla start to fade in the late summer. At this point the plant dries up and turns brown. The flower stalks are left with small ball or bowl shaped structures which contain the seed. You need to harvest these bowls. Seed can be stored in a sealed container in your refrigerator.
Species: Rabbitbrush, Chrysothamnus nauseosus (Pall.) Britt.
Zone: Grows best in dry and poorly vegetated prairie of the south and west, on eroded banks and saline clay flats.
Rabbitbrush seed is collected in late summer after the yellow blooms have all died back. The seeds look like tiny pencil leads (about 1 cm long) with a halo of fuzz on one end. The seeds can be stripped out of the plant using your fingers, or the plant can be shaken or beaten over a pail. Mature seeds will snap when you break them in half. Seed can be stored in a sealed container in the fridge.
Species: Red elder, Sambucus pubens
Zone: Grows best in southern Saskatchewan
Red Elder berries grow in clusters of dozens of tiny, bright red berries. These berries usually ripen in the end of July and into August. Pick the berries when they are ripe and fill the pail with water in order to float off as much debris as possible. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container or plastic bag and put it in the freezer.
Species: Red osier dogwood, Cornus stolonifera Michx.
Dogwood seed ripens throughout the summer. Ripe dogwood turns white and is soft and squishy. If you squeeze a berry, the seed should pop out. Dogwood berries are favoured by many types of wildlife, but have a bitter and unpleasant taste. Pick the berries when they are ripe and fill the pail with water in order to float off as much debris as possible. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Sandcherry, Prunus besseyi Bailey
Zone: Southern half of Saskatchewan
Sandcherry produces large grape-sized berries. In late July, early August the berries will ripen and turned a dark purple that appears almost black. These berries are very easy to pick off these low-growing shrubs. Pick the berries when they are ripe and fill the pails with water in order to float off as much debris as possible. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Saskatoon, Amelanchier alnifolia Nutt.
Zone: Grows best in southern Saskatchewan.
Saskatoon berries should be picked when they turn dark purple and are ready to eat. Seeds need to be removed from the fruit. This can be done using a blender with taped blades or another method of your creation. Once this is done you should float the fruit in water. The good seed should sink to the bottom, while the skins and pulp will float to the top. This may require several rinses and some hand sorting. By pouring the seed into a container in the path of a household fan, you can remove some of the smaller seeds and other debris. If you are not planning on sowing the seed right away, it should be laid out and allowed to dry for several days. A moisture content of just under 10% is ideal for storage. The seed can then be placed in a plastic bag, sealed, and stored in your refrigerator.
Species: Scot's pine, Pinus sylvestris L.
Cones should be collected just as they are starting to crack open, do not wait too long or the seed will fall out. Cones need to be dried immediately after collection. Spread the cones out in thin layers in the sun or in a well ventilated room. Drying should happen slowly. It can take anywhere from 2-60 days. Getting the cones to open completely can be a tricky proposition. Some species may open completely with just air drying. The literature suggests 10-16 hours in a 48°C (120°F) kiln will open the cones of Scot’s Pine. If this does not work it may be that the initial drying did not allow for proper opening or the temperatures were too cool. You can soak the cones for 12-24 hours, and lay them out to dry again. Some people use a boiling water dip to open cones as well. Once you have successfully opened your cones, they can be placed in a tray with a mesh bottom made of hardware cloth. As you shake the tray, the seeds will fall out through the holes in the cloth. You can then dewing the seeds by rubbing. Seed can be stored in a sealed container in the freezer if the moisture content is less than 10%.
Species: Seabuckthorn, Hippophea rhamnoides L.
Zone: Southern Saskatchewan, will not grow north of Prince Albert.
Sea Buckthorn fruit can be collected anytime after it ripens. Ripe fruit has an orangy-yellow colour. It can often have traces of red on it as well. One of the biggest challenges of picking Sea Buckthorn is the large thorns that are present on the tree. It is often easiest to pick this fruit after it freezes. If the berries are frozen solid, you can use leather gloves and just strip them off into a pail. If you chose to pick them before they are frozen you will have to pick them one at a time. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Shrub willow, Salix spp.
Zone: Grows in the southern half of Saskatchewan in moist areas like ditches.
Timing is very important on this species as the seed is released shortly after it matures. Seed pods form shortly after blooming in the spring. They appear like a small green cluster of tear drop shaped pods from a central axis. They usually mature in early to mid May. You must watch them very closely as they should be picked just as they are starting to crack and not before. Once you start to see signs of splitting you need to pick the pods and spread them out in a box with mesh on all sides. This ensures good air flow. You may also want to add a fan. Once all the pods pop open your box will be full of white fuzz. An air compressor is handy to stir up the fuzz and release the remaining seed from the pods. Next you take a clean shop vac and suck up the fuzz through the mesh. The seed will fall to the bottom and the fuzz will stick to the filter. You may have to run the fuzz through more than one to get all the seed. The seed is extremely small and will look like sand in the bottom of your vacuum. We typically store the seed in paper envelopes in a sealed container with some desiccant. It can then be stored in the freezer.
Species: Siberian crabapple, Malus baccata (L.) Borkh.
Crabapples ripen at the end of the summer and into the fall. The apples need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Siberian larch, Larix sibirica Ledeb.
Larch cones ripen in September through November. They turn brown when they are ripe. Freshly collected cones should be laid out in a thin layer in the sun, or a warm, well-ventilated room. The cones can be opened by solar heat, putting them in a heated room, or tearing them apart. Once the cones are open, they can be placed in a tray with a mesh bottom made of hardware cloth. As you shake the tray, the seeds will fall out through the holes in the cloth. Once the seeds are separated you can rub them to remove the wings. Finally, you can pour the seed in front of a household fan. This will blow out the wings and debris and leave you with relatively clean seed. Seed can be stored in a sealed container in the freezer.
Species: Trembling aspen, Populus tremuloides Michx.
Timing is very important on this species as the seed is released shortly after it matures. Seed pods form shortly after blooming in the spring. They appear like a small green cluster of tear drop shaped pods from a central axis. They usually mature in early to mid May. You must watch them very closely as they should be picked just as they are starting to crack and not before. Once you start to see signs of splitting you need to pick the pods and spread them out in a box with mesh on all sides. This ensures good air flow. You may also want to add a fan. Once all the pods pop open your box will be full of white fuzz. An air compressor is handy to stir up the fuzz and release the remaining seed form the pods. Next you take a clean shop vac and suck up the fuzz through the mesh. The seed will fall to the bottom and the fuzz will stick to the filter. You may have to run the fuzz through more than one to get all the seed. The seed is extremely small and will look like sand in the bottom of your vacuum. We typically store the seed in paper envelopes in a sealed container with some desiccant. It can then be stored in the freezer.
Species: Villosa lilac, Syringa villosa L.
Zone: Grows best in central Saskatchewan.
Lilac seed capsules will appear just after the flowers disappear. They can be picked in the fall after they have turned a bright brown. The capsules need to be broken open and then the debris can be removed by fanning or sieving. The seeds are long and thin and look kind of like wood. Once moisture content drops below 10% you can store the seed in a sealed container in your freezer.
Species: White spruce, Picea glauca (Moench.) Voss.
Zone: Will grow throughout Saskatchewan, performs best in the northern part of Saskatchewan (i.e. Prince Albert)
White spruce seed is produced in cones. Spruce cones are typically ready for harvest in late August through to early September. To ensure that they are ripe, you should pull a scale and look closely at the seed. It should be full, plump and white. You want to harvest cones whose scales are closed, not open. Once the cones are harvested they should be laid out in direct sun and allowed to open. Cones can be placed in a tray with a mesh bottom made of hardware cloth. As you shake the tray, the seeds will fall out through the holes in the cloth.
Species: Wolf willow (Silver berry), Elaeagnus commutata Bernh.
Zone: Best suited to Southern Saskatchewan
Wolfwillow seeds can be picked in the fall and well into the winter. Picking gets easier after leaf drop because the berries are more visible, however you can lose berries to wind at this point. These fruits are kind of difficult to clean because the fruits are quite dry and the powder found inside can be quite sticky. The berries need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.
Species: Wood's rose, Rosa woodsii Lindl.
Rose hips start to mature in mid May. They can be harvested once they start to turn red, or any time after that. Pick the hips when they are ripe and fill the pail with water in order to float off as much debris as possible. The hips need to be broken open. This can be done using a blender with the blades wrapped in tape or another method of your design. Place the pulp in a large pail and fill it with water. The good seed should sink to the bottom while the poor seeds, skin and pulp will float to the top. It may take several rinses to properly clean the seed. Lay the seed out on newspaper to dry. Once the moisture level drops below 10 % you can place the seed in a sealed container and put it in the freezer.