Species Rattle Milkvetch
purple-white flowers with green leaves and beige-red stems

Rattle Milkvetch

Astragalus laxmannii var. tananaicus

Also Known As - Standing Milkvetch
Rattle milkvetch (Astragalus laxmannii var. tananaicus) is a hardy perennial subshrub native to Alaska and northern Canada. It grows in tundra or taiga habitats, and it is part of the legume family. It has many hairy stems branching outward, and its bright green, compound leaves hold up to 17 leaflets each. Its most noticeable feature is a pale green flower found in small clusters, which can be heard when the seeds rattle inside. The plant's seeds are eaten by birds, small mammals, and some larger animals. It is often used by Alaskan Natives in traditional herbal medicine.

Watering:

Minimal

Hardiness Zone:

Sun:

full sun,part shade

Fruits:

Fruits Ready In

Leaf:

Yes

Growth Rate:

Low

Drought Tolerant:

Yes

Salt Tolerant:

Yes

Care Level:

Medium

watering

Rattle Milk Vetch should be watered deeply every 7-10 days during dry spells to ensure its health and to prevent wilting. It’s best to water in the early morning before the heat of the day or in the evening to reduce evaporation. Be sure to use a gentle sprinkling or soaking of deep, slow-release watering. Allow the soil to dry out between waterings, as plants of the species milk vetch do not do well when left in consistently moist or soggy soil. Watering should occur at the base of the plant to allow the roots to absorb the water without encouraging fungal growth on the leaves.

sunlight

The Rattle Milk Vetch (Astragalus laxmannii) is a species of plant that needs daily sunlight to thrive and grow. It should get at least 4 to 6 hours of direct sunlight each day during the summer months. In the winter, it is best to give the plant at least 2 to 3 hours of indirect sunlight each day. Extra light can be provided with artificial lighting.

pruning

Pruning should ideally be done twice a year for the Rattle Milk Vetch. The first pruning should occur in early spring before the plant begins to bloom, and the goal is to remove dead or diseased branches, as well as to shape the plant as desired. The second pruning should occur in late summer after the plant has finished blooming, and the goal is to remove any extra branches that are not needed or necessary for growth. Pruning should be done with sharp pruning shears, and should be done sparingly to avoid damaging or weakening the plant.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Harvest Fruit

⚠️ Perenual and its members cannot be held liable for any health issues that may arise from the information provided on the website or from using any of the plants found on the site. The information provided is intended to be used as general guidelines only.