Lilacs are renowned for being a simple flower to grow. For gardeners who don’t have a lot of free time, this low-maintenance plant is ideal.
Plants that grow lilacs don’t require much fertilizer. After the second year of planting, we advise fertilizing your plant. Early in the spring, treat your plant with a 10-10-10 all-purpose fertilizer to encourage blooming.
What kind of fertilizer is ideal for lilac bushes?
Lilac bushes respond well to fertilizer made from bone meal. This is as a result of increased soil alkalinity. It is a simple natural plant food that the lilac may consume.
Lilac fertilization isn’t necessarily required until the first and second years after planting. To sweeten the soil and prevent too much acidity, they could be fertilized with superphosphate and limestone when they are planted.
You can exclude standard fertilizer mixtures if the soil has the right balance and has a lot of organic matter. The only bushes that will truly benefit from annual feeding are those planted in poor soil. When you do feed the plants, use a 5-10-10 ratio. Around the plant’s root zone, distribute 1 cup (237 ml) of granular food evenly, and then water the soil.
How can I make my lilac bush produce more flowers?
Lilacs often bloom quite consistently, although occasionally they don’t. To ensure that yours grows, follow these suggestions:
- Usually, the issue is a lack of sunlight. Each day, the sun should be exposed for at least six hours.
- Nitrogen in excess might be problematic. Lilacs are frequently cultivated in lawns, and nitrogen-rich fertilizers are utilized to make lawns greener. This results in lovely green foliage on the lilac but minimal blossom. Avoid using nitrogen-rich fertilizers.
- Make sure to prune when the season is perfect. Remove any dead or damaged timber in the early spring. However, avoid performing any significant pruning because you can just remove the dormant flower buds. It’s acceptable to perform more significant trimming after the flowers have faded, such as reshaping or rejuvenating an elderly bush. The old flowers can be taken out as well. Just be sure you finish it before the middle of the summer. A few of the flowers from the upcoming season may be lost if you wait too late.
Visit the Lilac Planting and Care page for a comprehensive guide to lilac planting and care.
Do coffee grinds benefit lilac plants?
Use only a small amount of coffee grounds and grass clippings in your compost; they are good sources of nitrogen. The soil receives potassium from banana peels.
Do lilacs respond well to Miracle Gro?
Lilacs require a high phosphorus feed when the soil is deficient in phosphorus, which can only be determined through a soil test.
When nutrients are transformed into food that your flowering trees can use, phosphorus plays a crucial role. It is the primary component of an NPK-listed fertilizer and is represented by the second number on the package.
It aids in the promotion of healthy root development in addition to being necessary for the production of blooms and bruit. It can also be found in bone meal, where it combines with calcium to form calcium phosphate.
Bonemeal
You can obtain bonemeal in the form of a powder by grinding animal bones. It is steamed by manufacturers to create plant nutrients. So, to ensure that your plant stays healthy, add some of this lilac fertilizer to your soil if it needs to be more alkaline.
Epsom Salt
You can hasten the blooming of your indoor plant or the lilac in your garden by mixing Epsom salt and sugar. Your lilac bush will grow bushier and produce more flowers and chlorophyll as a result of using epsom salts. However, avoid overfertilizing your plant because it won’t flower.
Add Other Organic Matter
When it comes to organic matter, you may discover them in a number of solutions that are available to create a safer atmosphere.
Compost, manure, bone meal, and fish emulsion all include plant fertilizer. Additionally, as a good nitrogen source, you can use coffee grounds or grass clippings, but only in small amounts.
Miracle-Gro
Use Miracle-Gro Water Soluble All Purpose Plant Food when fertilizing lilacs. The fertilizer is excellent and won’t burn the foliage. For optimal results, feed your lilac once every 14 days while it is actively developing.
- The Miracle-Gro Garden Feeder can feed all of your outdoor plants in two ways and can cover up to 500 square feet in 12 minutes.
- Adding one tablespoon to each gallon of water will allow you to use it with a watering can as well.
- You simply need to combine half a teaspoon per gallon of water every two weeks if your lilac is grown as an indoor plant.
Leading Lilac Fertilizers
The following feeds are also options for your lilac plant if you’d prefer something different:
The BioAdvanced 701700B is a great alternative because it offers a special combination of nutrients to fight pests and promote lilac growth. It is a multipurpose plant fertilizer that kills pests and stays in the soil to maintain the health of your lilac plant. Your plant absorbs water through the roots even when it rains.
Your lilac plant will benefit from Scotts 200910 Evergreen Flowering Tree Food because it thrives in acidic soil. Utilizing it encourages blossoming and supports the development of strong roots. It also contains the ideal ratio of organic nutrients.
Jobe’s 06105 Fertilizer Spikes are made up of soluble potash, phosphate, and ammoniacal nitrogen. As a result, applying the feed only needs to be done once every eight weeks.
How are lilacs kept in good health?
An old, overgrown lilac was one of the few plants that endured my garden restoration. The fact that it obscured my neighbor’s garage and, more importantly, sported steel-blue double flowers, led me to rescue it. Although the blossoms on this shrub were both lovely and fragrant, it was difficult to appreciate them because there were so few of them. I decided to go with a rejuvenation pruning because I knew there was no reason to give up on this long-neglected plant because lilacs can handle severe pruning.
On stems that are no older than five or six years, the common French lilacs (Syringa vulgaris cvs.) yield the most and the largest flowers. The flowers get fewer, smaller, and farther away as the stems get older. A lilac, however, may reliably produce blossoms for decades with the right trimming. The method you choose will depend on how old your shrub is. Plants are maintained annually to keep them healthy. A more drastic trimming may be necessary for lilacs like mine that have seen better days.
Lilacs should be clipped annually to encourage healthy stem development and strong growth that improves flowering. Cutting sick, deformed, and unproductive stems to the ground constitutes annual pruning. I thin and cut back some stems as well to promote healthy, evenly spaced growth. To prevent them from growing too far away from the center of the plant, I also pruned a few of the new shoots that emerged from the roots. I left a few inches between each stem to prevent crowding. Since they produce the most, I maintain the pencil-thick shoots that extend all the way to the ends of the branches. Small, twitchy growth is unproductive and won’t blossom. This growth can indicate an excess of aged, unproductive stems or too much shadow. Remove stems as soon as possible after blossoming, or in late winter if you don’t mind losing a few blooms. Cut off stems and shoots at or just below the soil line.
Dwarf lilacs rarely need pruning
Both the “Palibin” Meyer lilac (Syringa meyeri “Palibin”) and the “Miss Kim” Manchurian lilac (Syringa pubescens ssp. patula “Miss Kim”) are twiggy-habiting, somewhat small lilacs. On these types, just deadheading is needed in terms of pruning. You can prune some of the older stems as the plants get older to make place for younger, more robust stems. In contrast to regular lilacs, these plants hardly ever spread out of control. They might never need to be entirely regenerated if you only undertake a tiny amount of trimming every few years.
After the blooms have faded, deadheading, another aspect of annual maintenance, should be carried out as soon as feasible. Just above the two new shoots that slant out from the stem that stopped with the old bloom, the base of the old flower cluster should be cut off. The new shoots will develop throughout the course of the summer, produce flower buds, and culminate in a cluster of flowers the following spring. While not as crucial as the annual thinning, eliminating the old blossoms enables the plant to focus more of its energy on developing robust branches and flower buds. In June, I deadhead and thin my plants as needed.
While performing this yearly maintenance, I occasionally come upon a young, robust shoot that may be getting too tall but is still a good, productive stem and is a candidate for tipping off. I cut the wasted flower’s entire top stem back to one or two side shoots at the desired height rather of just cutting it off at the base. The side shoots that are now near the top of the bush are encouraged to grow vigorously and develop flower buds for the following year by this cut, which also aids in shrinking the shrub.
My own old, overgrown lilacs need more severe pruning. I went outside in the early spring before growth got going to get a good look at the bush. I looked to see if the plant had been grafted before I began chopping. I immediately cut it down to the ground as it hadn’t (for a grafted plant, see the panel below). I recognized that this drastic trimming would result in the plant losing part of its aesthetic appeal for a few years because lilacs bloom on the growth from the previous season. However, I was also aware that the reward—more blossoms and a stronger plant—would be worthwhile.
It’s crucial to nourish the plant after rejuvenation pruning with compost, composted manure, or a balanced chemical fertilizer and to make sure the soil pH is close to neutral, which lilacs appreciate. In the upcoming years, these supplements and some high-quality mulch will help to encourage vigorous new growth and enhanced flowering.
Has your lilac been grafted?
If your lilac has been grafted, check it out before you start making cuts to the stems. Grafting is a method of plant multiplication in which the scion, or branch, of one species is joined to the rootstock, or stem, of another species. This is typically done to enhance a plant’s look or traits. A graft union, where the cultivar’s scion wood joins the rootstock several inches above ground level, should be obvious. An apparent change in the bark from the rootstock to the scion’s bark, as well as a little swelling at the graft union, are things to watch for. If your plant has been grafted, all of your cuttings must be made above the graft union, and you must prevent shoots from the rootstock from developing into new flowering stems. Flowers of the desired shape or color will not be produced by shoots that emerge from the rootstock.
Sun and shade
Bloomerang lilac trees need at least six hours of direct sunlight each day to grow and flourish. Although they can withstand little shade, they won’t grow as many blossoms.
Soil
Trees prefer alkaline, well-drained soil that is wet. Their roots may being damaged by wet soil. The right amount of moisture can be retained and the Bloomerang can be shielded from temperature changes by a thin layer of mulch.
Watering
The blooming season is when bloomerang lilac trees will require the most water. From spring through the end of bloom season, right before the first frost, water once every ten to two weeks. Two inches of water are required for your tree to receive moist soil that is down to 12 inches.
Water during prolonged dry spells the remainder of the year if the top three inches of the soil begin to totally dry up and if the leaves begin to wilt.
Fertilizing
Beginning the second year after planting, you can fertilize your Bloomerang lilac tree in the first few weeks of spring. Apply a lilac-specific fertilizer to your plants. These often contain more phosphate and potassium and less nitrogen. A good NPK value is 5-10-10.
Pruning
You don’t need to prune your Bloomerang lilac tree. Your tree will blossom once more regardless of whether it encourages new growth. If you choose to prune your tree, do it as soon as it blooms. The flower buds will be severed if it is done in the fall, winter, or before the first bloom. Trimming will cause the rebloom to happen a few weeks later.
Which month should lilac bushes be pruned?
All lilacs should generally be clipped right away in the spring after they have finished blooming. Lilacs set their flower buds for the following year immediately after the current year’s flowers have faded, therefore trimming later in the summer or fall will result in the removal of most or all of the blossoms for the following year. The larger common lilacs as well as the shorter or more “shrub like” cultivars are all subject to this timing guideline. While the “when” of lilac trimming is rather simple, the “how” is a little more difficult. For the time being, we’ll refer to lilac pruning as either maintenance pruning or rejuvenation pruning to keep things simple.
Why don’t my lilac plants bloom?
A. There are a number of potential causes for your lilac’s failure to blossom. Lack of sufficient sunlight is the main culprit. Lilacs (Syringa) should be planted in an area with at least six hours of direct, bright sunlight per day. They can withstand a wide range of moisture levels as long as they are grown in soil with good drainage.
If your lilac is clipped at the wrong time of year, it might not blossom for another reason. Lilacs bloom in the spring on the growth from the previous year, and soon after, they begin to form the buds for the following year. Within a few weeks of the plant blooming, pruning must be done simultaneously with the removal of the wasted flowers in order to prevent the removal of the buds for the following year. A late freeze can harm flower buds on types that bloom early.
Lilacs have a tendency to mature into overgrown, leggy shrubs with minimal foliage at the bottom. When this occurs, it might be required to prune them to within 12 inches of the ground in order to completely rejuvenate them. When the shrubs are dormant in late winter, this should be done. Lilacs benefit from this repair, although their blooming cycle will be hampered for at least one season. Lilacs can receive a rejuvenation pruning over a two-year period to stop the interruption of bloom cycles. Half of the shrub’s stems should be hard pruned the first year, and the remaining stems the following year.
Lilacs do not consume a lot of food. Excessive fertilization, particularly nitrogen fertilizer, can frequently promote luxuriant vegetative growth at the expense of flower development. A lilac’s failure to bloom could potentially be due to its proximity to turf that receives frequent fertilization.