Species Timber Milkvetch
white-blue flowers with green leaves

Timber Milkvetch

Astragalus miser var. serotinus

Timber Milkvetch (Astragalus miser var. serotinus) is an iridescent, nitrogen-fixing perennial herb belonging to the Fabaceae family that is native to the western United States. It has highly branched stems that reach heights up to 30 cm in good conditions and variable compound leaves with lance-like leaflets. Its fragrant, creamy-white flowers are densely packed on upright racemes and appear in late spring or early summer. The Timber Milkvetch is hardy and drought tolerant, and prefers deep, rocky or sandy, well-drained soils with some added compost. It is a nutrient accumulator and an important food source for wildlife. Plants attractive to bees, butterflies, and other pollinators may be established in the garden and used for highly attractive long-lasting cut flowers.

Watering:

Frequent

Propagation:

Seed Propagation,Division,Cutting,Layering Propagation

Hardiness Zone:

Sun:

full sun,part shade

Fruits:

brown,tan Fruits Ready In Fall

Leaf:

Yes

Leaf Color:

green,yellow

Growth Rate:

Low

Drought Tolerant:

Yes

Salt Tolerant:

Yes

Care Level:

Medium

watering

Water Timber Milkvetch often enough to keep the soil moist, but not wet, throughout the growing season. In general, water the plants once a week, either by hand or with an irrigation system, so that the soil is moist to a depth of 8-12 inches. Plants in sandy soils will need more frequent irrigation. For container plants, water thoroughly when the top inch of soil is dry, typically every other day. During hot weather or in very dry climates, consider adding an additional weekly watering. During the winter, irrigation is not typically necessary.

sunlight

Timber Milkvetch requires 6-8 hours of full sun to thrive. This full sun exposure should be sustained on a daily basis, as periods of shading can affect the plant's growth. Ideally it should receive full sun during the morning or mid-day hours when light intensity is higher. Timber Milkvetch should be planted in an area that receives morning sun and afternoon shade, but will still tolerate full sun throughout the day.

pruning

Timber Milkvetch (Astragalus miser var. serotinus) requires light pruning no more than once per year, typically in late summer or early fall. This should be done after flowering has stopped by removing dead,Non-flowering wood at the base of the plant. Prune up to half of the stems at the crown and remove any side shoots from remaining stems. In harsher climates, Timber Milkvetch should not be pruned until late fall or early winter.

Season

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

The best time to start harvesting the fruits from Astragalus miser var. serotinus is typically in July and August.