Missouri Milk Vetch

For Missouri Milk Vetch, watering should be done regularly but in moderation. During its active growth period (April-August), the plant should be watered 1-2 times a week, and each watering should be deep enough that the top 3-4 inches of soil is damp. During the dormant period (September-March), when the plant is not actively growing, it should only be watered 1-2 times per month, or when there is a prolonged period of hot or dry weather. Ensure that proper drainage is available, as this plant does not tolerate "wet feet" and can be susceptible to root rot if overwatered.

Missouri Milk Vetch thrives in direct sunlight and prefers 6-8 hours of sun per day. It grows best when planted in full sun for the majority of the day, with afternoon shade or filtered sunlight during the hottest time of the day. It can tolerate partial shade, but will not flower as well. It is best to give the plant as much sun as possible during the morning and mid-day hours, and then provide some respite from the heat and light in the afternoon shadows and filtered sun.

Pruning of Missouri Milk Vetch (Astragalus missouriensis var. missouriensis) should take place during the fall when the leaves and stems of the plant have become dry and brittle. Pruning should be moderate and kept to around 1/3 of the original height. It is important to snip off the dry, brittle stems and leave the new growth at the base and tip. When possible, prune away all deteriorating, diseased, or dead stems. Pruning at this time of the year will encourage new growth in the spring.