These wonderful plants will fill your yard with delicious scent.
When the lilacs begin to blossom, it is a solid indicator that spring has arrived for good. While many people only have a limited knowledge of common lilac (also known as French lilac) shrubs that can reach a height of 15 feet or more, there are now a lot more options available than there were fifty years ago. Some varieties that rebloom enhance the garden’s appeal the entire growing season.
How to Choose Lilacs
The common lilac is what you will most likely find when you go plant shopping. This traditional plant comes in a variety of cultivars and variations, each of which yields fragrant spring flowers in pink, purple, white, or even combinations of those hues. Common lilacs are typically the most fragrant variety of lilac and can grow to be rangy and large.
Rebloomers have arrived in the garden center thanks to recent introductions of hybrids between the common lilac and other shrub-type lilacs. Some of these more recent types are a little less fragrant, but they also tend to be smaller, bloom more frequently throughout the growing season, and have fewer powdery mildew issues.
The tree lilac is another common variety of lilac. It can grow to a height of around 20 feet and blooms with cream-colored flowers in the middle of the summer. Though it doesn’t require much trimming, keep in mind that the tree lilac is a tree, not a shrub.
Where to Plant Lilacs
Lilacs should be planted in full light (at least 6 to 8 hours per day), as too much shadow will prevent them from blooming. Lilacs also prefer moist, well-drained soil that is slightly alkaline.
When to Plant Lilacs
Before the ground freezes in the late fall is the ideal time to plant lilacs. After the earth thaws in the early spring, that is the next ideal period to plant. Lilacs will likely need to be planted as soon as you can locate them at the garden center, which is great; if you choose to do so during a warmer season, they might require additional watering.
How to Prepare the Soil for Planting Lilacs
A soil test should be performed prior to planting since lilacs thrive in slightly alkaline (6.5 to 7.0 pH), moist, well-drained soil that is high in organic matter. Lime must be added to raise the pH if it is below 5.5. It’s time to get the soil ready when you’ve obtained the ideal pH. Improve individual planting holes by mixing Miracle-Gro Garden Soil for Trees & Shrubs in a 50:50 ratio with the natural soil to give lilacs a nutrient-rich start. Iron and phosphorus are also present in this garden soil to promote root development and ward off leaf fading.
Are lilacs suited for coffee grounds?
Lilac plants don’t require a lot of food or fertilizer. A 10-10-10 fertilizer mixture applied yearly in the early spring is what we advise. (The amounts of nitrogen, phosphorus, and potassium, or NPK as they are popularly known, are represented by the digits 10-10-10 in the formula.) Early spring fertilization of lilacs with a high phosphorus solution encourages blossoming.
Coffee grounds and grass clippings are also excellent sources of nitrogen. Use in moderation since an excess of nitrogen in the soil can lead to subpar blooms. The ideal soil conditions for lilacs are slightly alkaline (6.5–7.0 pH), wet, and well-drained. The soil may become more alkaline by adding bone meal to it. Use Miracle-Gro Shake ‘n Feed Flowering Trees & Shrubs Plant Food in the spring if you decide to feed your plant. Last but not least, lilac plants dislike acidic soil. Epsom salts can be used to encourage blossoming while the plant is dormant.
Do lilacs prefer clay-based soil?
Lilacs appear to be the plant that gardeners are most fascinated with. Although the plant itself is not particularly attractive and its blooms barely endure a week to ten days, they are nonetheless highly popular.
Gardeners will undoubtedly remember the lovely blossoms in May by their wonderful scent throughout the rest of the season.
Lilacs should be planted in the spring, but they can be planted at any time if they are balled and burlapped or grown in containers.
Up until they become established, plants should be kept consistently moist; nevertheless, they should not be overwatered because damp feet bother them. Lilacs will grow sickly and badly if they are planted in hard clay soils that remain moist long into spring.
Lilacs should not be used as foundation plants, according to gardeners. The majority of kinds quickly overrun a location close to the home as they grow 10 to 12 feet tall. Give them lots of space when planting close to the house, maybe on a landscape bed that protrudes 15 to 20 feet from the foundation.
Where shouldn’t lilac bushes be planted?
Avoid planting lilacs in areas that will receive more than a half-worth day’s of shade because they thrive in full sun. Make sure to give them room to expand when you plant them. To find out the mature plant’s height and spread, read the label on the plant.
Lilacs require sufficient drainage to thrive. The soil should have just enough moisture to support the root system while still allowing for free drainage after heavy rains.
Dig a hole that is about 8 inches in diameter and 12 inches deep to test the drainage before planting. Add water to the hole. Choose a different location if the water hasn’t drained after an hour.
Lilacs can they withstand acidic soil?
Lilacs’ soil pH Lilacs prefer soil with a pH between 6.5 and 7.0, which ranges from slightly acidic to slightly alkaline. If the pH is either too high or too low, the bushes may suffer because the nutrients they require from the soil may not be easily available.
The ideal compost for lilacs is…
Lilac bushes require little general maintenance because they are low-maintenance shrubs, with the exception of periodic trimming.
Lilacs may withstand a variety of soil types, although they prefer humus-rich, well-drained soil. In order to make a good planting soil for them, incorporate compost into the soil. Lilacs prefer to have their roots kept dry, therefore they should be irrigated properly but sparingly.
It is not required to fertilize lilac trees frequently. However, if there isn’t too much nitrogen present, which would cause insufficient flowering, fertilizing in the early spring may assist promote flowers.
Lilac plants are typically hardy, but occasionally they are plagued by insect pests like borers. Watch for any indications of a pest problem and take fast action to treat it. Sometimes treating insects with a soapy water spray will be adequate. For the care and health of lilac trees, however, it can be essential to completely prune the plant if there are severe infestations.
Pruning is crucial for lilac maintenance. Lilac plants should be well-pruned to reduce the risk of diseases like powdery mildew.
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.
Fungal diseases
This season, the Lilac Pseudocercospora leaf spot, a fungus, was detected in lilac samples examined by the Plant Disease Clinic. The same symptoms have been recorded (yellowing then browning leaves, dieback).
The PDC places a strong emphasis on sanitation because it appears that Pseudocercospora spores can survive on plant detritus for a number of years (leaves, stems, dead flowers, bark).
- To assist lessen the possibility of reinfection the next season, remove fallen leaves.
- Consistent watering and renewal cutting to reduce density will sustain the stressed plant.
Several of the plants in our landscapes, including lilacs, are afflicted by verticillium wilt. Verticillium dahliae and Verticillium albo-atrum are the two fungi that cause it. For a plant with this fungus infection, there is no cure.
- As a result of the fungi clogging the branch’s vascular system and preventing the transfer of water and nutrients, individual branches turn brown and die quickly.
- To increase plant longevity, increase watering and fertilization.
- The disease can spread across all sections of the afflicted plant, thus the best preventive is to buy resistant cultivars and practice proper hygiene.
Insects
The Lilac Borer, sometimes known as the Ash Borer, is a clearwing borer moth that creates tunnels in lilac stems.
- Frass, sap, and sawdust are warning signs (excrement).
- Some plants can withstand this harm.
- Others see branch dieback, and occasionally the entire plant dies.
- They won’t likely catch anyone’s attention.
Jeff Hahn, an extension entomologist, confirmed that no lilac borer samples have entered his lab this year.
Herbicide damage
Broadleaf weed treatments on lawns may volatilize, changing to a gas, and float onto unintended plants if sprayed during periods of extreme heat and humidity.
Herbicide damage signs like cupping and browning would appear in patterns:
- along a hedge’s one side but not the other,
- bushes positioned in or close to lawn areas, at the same level throughout their bases,
- and most critically, away from the area’s predominant winds.
Lilac hedges next to agricultural fields or other sizable herbicide-treated areas may experience damage in this manner.
Sandier soil is it good for lilacs?
It’s time to discuss soil now that the season and lilac varieties have been addressed. Lilac bushes can grow in a variety of soil types and are fairly flexible, however they do like alkaline soil with a pH of 6.5-7.
A soil test kit, which you can get on Amazon or pick up at your neighborhood garden center, can be used to check your soil before you plant. You’ll simply need to devote a short amount of time to testing.
You can add garden lime to your soil to make it more alkaline if it occurs to test too acidic.
(Always keep in mind that using a garden fork or any other type of gardening equipment on dry soil can damage it. The soil should ideally be moistened first).
Apart from alkaline levels, people with diverse types of soil—even those with clay soil—have succeeded in cultivating lilacs.
Working some organic debris, such as dead leaves, into the soil will aid your lilac bush if you have trouble with clay soil by promoting drainage and air circulation.
Due to their preference for well-drained soil, lilacs can thrive in sandy environments. Sandier soil offers a better environment because it doesn’t hold onto more water.
Dig a hole that is as deep as the rootball, as wide as the container, plus a few extra inches in breadth, to plant a container-grown lilac. Remove the lilac from its packaging with care, then plant it in the hole.
Sprinkle some root booster into the planting hole, if desired. (Nature Hills Nursery is where I purchase my. When I bought their lilacs, they suggested it to me. Root booster is a treatment that expedites the lilac bush’s establishment while also giving it the right nutrition.
After inserting the pot into the hole, fill it with dirt and lightly press down to secure the lilac bush. Thoroughly water.
Planting Lilacs in Containers
Lilacs can be grown in containers if you wish to! There are several lilac types that have been produced for pots, yet it’s not the best option since they want to spread out many feet wide.
If you don’t intend to stay in your current residence for an extended amount of time, this is a viable option. After all, lilacs can survive for up to 100 years in the same planting location!
Choose a lilac variety that is better suited for containers, such as the Dwarf Korean Lilac, Minuet Lilac, or California Lilacs, if you want to grow your lilac in a pot.
Actually, I’m cultivating a Boomerang Reblooming Purple Lilac in a container right now because I want to control its development before we move next year.
Thankfully, the instructions are the same for container-grown lilacs. Look for the largest container that would work for the space where you plan to grow the lilacs. Your lilac won’t experience suffocation when it begins the growing season if you do this.