Frangula alnus, commonly known as Alder Buckthorn, is a deciduous shrub or small tree native to Europe, northwest Africa, and western Asia. It typically grows in temperate climates and can be found in wetlands, woodlands, and along riverbanks. The plant has glossy green leaves and produces small, greenish-white flowers followed by dark berries. It has a dormancy period during the winter months.
Alder Buckthorn prefers moderate temperatures and indirect bright light. It thrives in evenly moist soil and benefits from regular watering, especially during dry periods. The plant enjoys moderate humidity and should be protected from extreme temperatures. Regular pruning helps maintain its shape and encourages healthy growth.
Soil
Frangula alnus prefers loamy soil that is well-draining yet retains moisture. The soil should be slightly acidic to neutral in pH. Adding organic matter can improve soil structure and fertility, providing the plant with the nutrients it needs.
Fertilizer
A balanced fertilizer with an N-P-K ratio of 10-10-10 can be applied during the growing season to support healthy growth. Fertilize once in early spring and again in mid-summer for best results.
Repotting
If growing in a container, repot Alder Buckthorn every 2-3 years or when the plant outgrows its pot. Choose a slightly larger pot with good drainage and refresh the soil mix. Repotting is best done in early spring before new growth begins.
Propagation
Alder Buckthorn can be propagated by seeds or cuttings. Seeds should be sown in the fall, while cuttings can be taken in late spring or early summer. Use a rooting hormone to encourage root development and plant the cuttings in a well-draining soil mix.
Pruning
Prune Alder Buckthorn in late winter or early spring before new growth starts. Remove any dead, damaged, or diseased branches, and thin out crowded areas to improve air circulation. Regular pruning helps maintain the plant's shape and encourages vigorous growth.
Toxicity
All parts of Frangula alnus are toxic if ingested, particularly the berries. The plant contains compounds that can cause gastrointestinal distress in humans and pets. It is important to keep the plant out of reach of children and animals.
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