common buckthorn

Common buckthorn (Rhamnus cathartica) requires regular watering to keep the soil lightly moist. Water the plant every 5-7 days, when the top 1-2 inches of soil feels dry. During hot weather, it may require more frequent watering (around 3 times per week). Do not over-water, as this can cause root rot and other issues. Additionally, increase watering frequency during its active growth season, which is usually in the spring and summer months. Make sure to reduce watering frequency during its dormant period, or when the temperature drops. Water the soil near the root of the plant instead of the leaves, as wet leaves can result in fungal problems.

Common buckthorn (Rhamnus cathartica) thrive in areas that receive plenty of direct sunlight.For optimal growth and development, the plant should receive a minimum of 5 hours of unfiltered sunlight per day. If grown in areas that receive more sunlight, such as the southern portion of its native range, then 6-8 hours of direct sunlight is optimal for the plant. If grown in areas with reduced sun exposure, such as in northern regions, then just 3-4 hours of sun is still sufficient. In any case, the plant should ideally receive the majority of its sunlight earlier in the day, as this helps stimulate growth and prevents scorching of the sensitive leaves later in the day when the sun is strongest.

Common buckthorn plants should be pruned in late winter or early spring. This species prefers light to moderate pruning during this time to maintain its growth shape and size. Depending on the size of the plant, pruning can be done by hand using clippers to thin and shape the crown and branches. Generally, up to a third of the plant should be pruned at once. If needed, larger pruning can be done over a few years. It is important to not remove more than a third of the plant each year to avoid stressing the plant. Additionally, dead or diseased branches should be removed as they are noticed.