What causes the fragrant wood plant (Pistacia weinmannifolia) to keep dropping its leaves?
Pistacia weinmannifolia is a sun-loving tree, but it also tolerates light shade. It likes warmth, requires deep soil, has strong sprouting ability, grows slowly, and lives a long time. However, its seedlings are not very cold-resistant and need protection in North China. The plant can withstand low temperatures of -10°C and prefers soil with plenty of light and good drainage. Why does Pistacia weinmannifolia keep dropping its leaves? Many people are puzzled by this question, but there are mainly the following reasons.
Leaf drop caused by over-fertilizing
Pistacia weinmannifolia is quite sensitive to fertilizer. Seedlings should be fertilized as little as possible or even not at all, to avoid burning the seedlings or causing excessive leggy growth due to too much fertilizer. For cutting propagation, cuttings can be taken in both spring and autumn. Using plant non-test-tube rapid propagation technology, it can be done year-round: during the growing season, take one leaf with one bud; during the dormant period, take a single branch segment. During the tree's dormant period, select 1-year-old robust branches from a vigorous mother tree.
Leaf drop caused by over-watering
Pistacia weinmannifolia likes dryness, so it is hard to water it just once. Watering should follow the principle of not watering until the soil is dry, and when you do water, water thoroughly. Do not let it stay waterlogged for a long time or let water accumulate in the saucer for a long time!! Even more, do not water only the surface layer; you must water thoroughly! Generally speaking, watering for more than 10 seconds up to a few minutes (depending on pot size and soil type) until water drains from the bottom is enough.
Leaf drop caused by light and ventilation
This condition easily appears when there is a long-term lack of light. Poor ventilation can also cause Pistacia weinmannifolia to drop its leaves, so good ventilation conditions should be maintained.