Nitrogen Fixers

Species: Hippohae rhamnoides

History: Oops! As sometimes happens in the nursery business, we received what were supposed to be female sea buckthorn plants but turned out to be male ones. Although they are not what we had anticipated, they are still excellent pollination partners for female plants.

Why We Grow It: Male sea buckthorn plants are vigorous and strong pollinators. Although they do not produce berries, they are also useful as fodder, ornamentally, and as erosion control. Sea Buckthorn also have nodules on their roots which help fix nitrogen into the ground, and are a common plant in permaculture orchards for this natural 'fertilizer' effect on plants in their vicinity.

Species: Gleditsia triacanthos

History: Honey Locust is native to the central United States where it has been used by indigenous peoples as a source of food and medicine. Its name is derived from the pulp inside the pea pods which is quite sweet and crisp. It has been commonly planted as a landscape tree in many places around the world due to its ability to survive many conditions too harsh for other trees. Unfortunately, Honey Locust's tenacious nature has caused it to become invasive in some places.

Why We Grow It: Reaching 30 meters tall, this native nitrogen fixing tree benefits many including bees, wildlife, and even humans: we can use the sweet (honey flavoured) pulp inside their pods in baking, tea or for brewing beer. Honey Locusts grow impressive thorns, 3-10 cm long which can be used for pins or nails in a pinch and the durable, rot-resistant wood has a variety of uses.

Species: Gymnocladus dioicus

History: Kentucky Coffeetrees are native to the southernmost parts of Ontario and the midwestern United States. Despite its fairly large range, it is relatively rare today likely due to evolutionary anachronism. It is believed Kentucky Coffeetrees co-evolved with megafauna that are now extinct, so previously beneficial traits like the thick leathery pod around its seeds now hinder seed dispersal. Indigenous peoples have used the tree as a source of food by roasting the seeds and making a coffee-like drink, and the seeds have also been used as pieces in games and to make jewellery. Nowadays, the tree is planted ornamentally in urban areas.

Why We Grow It: This nitrogen-fixing, Carolinian tree produces seeds that may be roasted and used as a coffee substitute, but be aware the raw seeds are toxic! This tree boasts the largest leaves of any native tree, and it's considered a threatened species. 

Species: Hippohae rhamnoides

History: Lord was developed by Latvian professor of agriculture, Andrejs Bruvelis, and was likely selected for its relatively few thorns and excellent performance as a pollination partner for female plants. 

Why We Grow It: A vigorous and strong pollinator, Lord has silvery green leaves which may be used as animal fodder- rather than discarding prunings from the plant, try feeding them to birds, or better yet, let some chickens keep the base of the bush clean and sucker-free by purposefully pasturing them through your plants. Sea Buckthorn have nodules on their roots which help fix nitrogen into the ground, and are a common plant in permaculture orchards for this natural 'fertilizer' effect on plants in their vicinity.

Species: Hippophae rhamnoides

History: Mary sea buckthorn, aka Marija Bruvele, is a Latvian variety that was bred by professor of agriculture Andrejs Bruvelis as a cross between the female varieties Botanicheskaya Ljubitelskaya, Chuyskaya, and native male plants from the coastal area of the Baltic Sea. The goal was to create a variety better adapted to maritime climates. The berries are high in oil content so this variety tends to be grown commercially for oil production.

Why We Grow It: A prolific variety that holds onto berries well, prolonging harvest for 4-6 weeks. The berries have a milder flavour compared to other sea buckthorns with much lower acid content. They can be made into a sunshine yellow juice, best diluted 70% with water for a Canadian version of orange juice. It's also nearly thornless, which makes harvesting much easier.

The leaves and young branches are suitable for animal fodder, which we can attest to from the hens that run around our retail area in summer, sampling from our potted sea buckthorn plants whenever Steph isn't around to chase them away. Sea Buckthorn have nodules on their roots which help fix nitrogen into the ground, and are a common plant in permaculture orchards for this natural 'fertilizer' effect on plants in its vicinity.

Species: Myrica pensylvanica

History: Northern Bayberry can be found from Ontario to Newfoundland and south to North Carolina, most frequently growing along the west coast. Its berries are a food source for several birds and small mammals. The berries also produce a waxy coating that European colonists used to make candles. 

Why We Grow It: This hardy, nitrogen-fixing shrub is a great addition to fencelines, native gardens, and areas that need erosion control. The berries are a good food source for several species and the crafty gardener can also use the berries to make clean-burning candles. They will spread over time.

Species: Hippophae rhamnoides

History: Pollmix sea buckthorn was developed as a series of clones to aid in the pollination of female sea buckthorn plants. It is a German cultivar.

Why We Grow It: Although Pollmix does not produce berries, it is a good option for pollinating female varieties! Aside from that, the attractive silvery green leaves can make this shrub an appealing plant to have in the yard, and it is also good for erosion control or creating windbreaks.

Species: Hippophae rhamnoides

History: Sea buckthorn is native to parts of Europe and Asia where it has been a source of food, medicine, and fodder for centuries. These seedlings were grown by us so it will be a bit of a surprise to see what the mature plants are like!

Why We Grow It: If you're looking for a dense, fruiting bush, look no further! These cold-hardy plants are grown from seed, and unlike cultivated varieties it is uncertain whether each seedling is male or female. The nodules on their roots help fix nitrogen into the soil, and the resilient plants are salt tolerant. They can withstand the juglones from walnuts and will reach up to 6 meters tall, forming virtually impermeable thickets if left to their own devices. The berries have a wide range of uses and the leaves can be enjoyed in tea.

Species: Caragana arborescens

History: As the name implies, Siberian pea shrubs are native to Siberia but also parts of China, Mongolia, and Kazakhstan. They came to the US with Eurasian immigrants who used the pods as a source of food while traveling. It has been planted ornamentally and as bonsai, and can be used as erosion control. It is also unfortunately invasive in some parts of the US.

Why We Grow It: A classic permaculture plant! Siberian pea shrubs are nitrogen fixing, very hardy, disease and drought resistant, and, above all, edible. The flowers and young pods can be eaten fresh while the older pods are cooked. The plants are also attractive to pollinators.

Species: Shepherdia argentea

History: Silver Buffaloberries are native to the southern parts of the prairies, parts of the northern US with scattered populations further south. It is an important source of food and habitat for many species including Saskatchewan's provincial bird the sharp-trailed grouse. It is traditionally used by indigenous peoples in its range as food, seasoning, medicine, dyes, and in coming-of-age ceremonies for girls. 

Why We Grow It: Silver Buffaloberries are an excellent addition to native gardens, food forests, and hedgerows! They are tolerant of a wide array of conditions and are also nitrogen-fixing. These shrubs are some of the first to produce flowers each spring, making them good resource for pollinators. The berries, which are often red but may be orange or yellow, are a good source of food for birds later in the season. The edible berries are on the bitter/tart side but are much more enjoyable when made into jams, jellies, and pies! Just be mindful these shrubs are thorny and will spread over time.

Species: Alnus incana (likely subsp. rugosa)

History: Native to large portions of the Northern Hemisphere including parts of North America, Europe, and Asia, this widespread tree is often divided into six subspecies. We likely offer Alnus incana subsp. rugosa but with seedlings it is hard to say for sure. Indigenous people have used these trees for medicine and dyes, and they can also be used for erosion control. This subspecies in general is unique for its cold hardiness and ability to fix nitrogen, making it a useful companion plant in permaculture settings.

Why We Grow It: Named for the white lenticels that dot the reddish-gray bark, Speckled Alders can make a useful addition to a permaculture with their ability to fix nitrogen. However, keep an eye on this tree as it tends to spread via suckering (sending up new shoots) and layering (branches rooting into the ground) and can form dense thickets.

Species: Hippophae rhamnoides

History: Tatiana (aka Tatjana) was developed in Latvia by renowned professor of agriculture Andrejs Bruvelis. The large berries, high oil content, and long harvest period have made it a popular commercial variety, particularly in the nutraceutical industry.

Why We Grow It: Tatiana produces large berries with a distinctly dark orange/reddish tinge. They are high in acidity so there is a strong sourness paired with their otherwise pleasant flavour, making them a great option for using in food or beverages. They are also quite high in oil which is said to beneficial for hair and skin. 

Special Note: We take special care to grade out (remove) any of these seedlings that are showing visible thorns when we dig them in the fall. This increases the likelihood (although we cannot make any guarantees) that you will not have thorns develop on your Thornless Honey Locust Seedling. If you don't mind thorns on your Honey Locust, the ones we grade out are available here at a lower pricepoint.

Species: Gleditsia triacanthos

History: Thanks to its ability to tolerate a host of adverse conditions that would hinder or kill other trees, Honey Locusts have been cultivated for us as ornamental, urban trees. As a result, several thornless varieties have been developed including the mother tree for these seedlings.

Why We Grow It: Honey Locust has many benefits for permaculture and now growers do not need to worry about popping tires with thorns thanks to these thornless trees - though they are seedling so some may develop thorns though most will not; these can be top grafted with a thornless type if needed. Reaching 30 meters tall, this native nitrogen fixing tree benefits many including bees, wildlife, and even humans: we can use the sweet (honey flavoured) pulp inside their pods in baking, tea or for brewing beer. The durable, rot-resistant wood has a variety of uses.