When to Feed a Lilac
Plant food helps promote better leafy growth, healthy roots and better nutrient and water uptake, as well as better blooming and production.The ratio in fertilizer refers to NPK, which are the macronutrients a plant needs for optimum health. They are nitrogen, phosphorus and potassium. Plants with a high first number are formulated to enhance leafy growth, while phosphorus and potassium spur root health and flower and fruit production.
Fertilizing lilacs with anything but a balanced fertilizer can create excessive foliage or heavy blooms. The best lilac plant fertilizer is a closely balanced fertilizer applied when active growth is just beginning. Since lilacs are deciduous, this is in spring just as the canes begin to awaken.
How to Fertilize Lilac Shrubs
Bone meal is a great fertilizer for lilac bushes. This is because it makes soil more alkaline. It is a natural plant food easy for the lilac to intake.Fertilizing lilacs isn’t strictly necessary except after the first and second years of planting. They may be fertilized at planting with a superphosphate and limestone to sweeten the soil and avoid excess acidity.
As long as the soil is the proper balance and there is plenty of organic matter, you can forgo traditional fertilizer mixes. Only bushes planted in poor soil will really benefit from annual feeding. Use a 5-10-10 ratio when you do feed the plants. Spread 1 cup granular food evenly around the root zone of the plant and water into the soil.
General Lilac Care
For old, poorly cared for plants that have become tangled masses of suckers, prune the bushes after bloom to rejuvenate them.http://www.gardeningknowhow.com/ornamental/shrubs/lilac/lilac-plant-fertilizer.htm
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