Reasons Why Lilacs Don't Bloom, Plus Care Tips and Precautions
Lilac is a common flowering shrub, with delicate colors and a fragrant scent, often planted in courtyards. However, if you notice that your lilac is not blooming regularly, its leaves are dropping, or you notice it wilting, this indicates that your lilac may die. You need to take some time to find out the cause.
Sunlight
Lilacs must be exposed to full sunlight. If a lilac is affected by partial shade or shadow and cannot enjoy sunlight exposure, it will wilt and the flowers will not bloom. Although it takes a while, eventually, the shade will kill the plant. Either prune the overly tall branches above the shrub, or transplant the plant to a sunnier spot, to prevent damage caused by insufficient light.
Fertilizer
Lilac shrubs do not need much fertilizer, and if you use strong chemical fertilizers, the plant may die from over-fertilization. If you believe this has happened, try replacing some of the fertile soil with ordinary soil. Next, fertilize only by adding some natural products to the lilac's soil, such as compost, and do so in moderation.
Pests
Pests like aphids or ladybugs can damage the leaves on your lilac, causing the lilac to wilt over time. To eliminate the pests, you can spray an over-the-counter insecticide on the lilac shrub once a week. If you still see pests after one to two months, you need to consult a professional pest control expert.
Crowding
Lilac shrubs grow quite large, reaching 1.8 to 2.7 m underground. If you have many shrubs near the lilac shrub, they will absorb the soil's nutrients. When this problem occurs, the lilac shrub will shrink, and then they will begin to show signs of malnutrition (spotting, wilting, etc.). To solve this problem, either transplant the lilac, or pull out the plants that are too close to it.
Key care points and precautions for lilacs:
1. Lilac prefers a tropical island climate; the climate of its native region is characterized by an equatorial rainforest climate, with a minimum monthly average temperature of 21°C.
2. When extreme low temperatures reach 3°C, it can cause the lilac plant to die.
3. For growing lilacs, neutral soil is preferable; avoid acidic soil, and avoid waterlogging and damp heat.
4. Lilacs do not like heavy fertilizer; do not fertilize too much, otherwise it will affect blooming.
5. The main pests of lilacs are aphids, bagworms and stinging caterpillars. They can be controlled by spraying with 800-1000 times diluted 40% dimethoate emulsion or 1000 times diluted 25% phosmet emulsion.