Although lilacs don’t require plenty of fertilizer, it’s essential to feed them after 2 years of planting. If you make the right decision, it can help your lilacs bloom more with more beautiful flowers. Not all of them work the same, so you need to learn about how to choose the best fertilizer for lilacs and pick one from the list below:
Here are the best fertilizers for lilacs you can buy in 2023:
- Best For Quick Results: Miracle-Gro Water Soluble Plant Food
- Best For Long-Lasting Blooms: Miracle-Gro Plant Food Spikes
- Best For Lush Foliage: Jobe’s Fertilizer Spikes
- Best For Soil Enhancement: MARPHYL Organic Liquid Fertilizer
- Fertilizer & Insecticide Combo: BioAdvanced Granules
- Best For Root Growth: Scotts Plant Food
|6 Best Fertilizers For Lilacs|
Best For Quick Results
|Miracle-Gro Water Soluble Plant Food|
Best For Long-Lasting Blooms
|Miracle-Gro Plant Food Spikes|
Best For Lush Foliage
|Jobe’s Fertilizer Spikes|
Best For Soil Enhancement
|MARPHYL Organic Liquid Fertilizer|
Fertilizer & Insecticide Combo
Best For Root Growth
|Scotts Plant Food|
Best For Quick Results: Miracle-Gro Water Soluble Plant Food
- Helpful for both inside and outside plants
- Great price
- Easy to use
- Not straightforward to dissolve
If you want to see your lilacs bloom as soon as possible, just choose the Miracle-Gro Water Soluble Plant Food that can provide your lilacs with nutrients within a short time. Among all forms, this water soluble plant food can bring the quickest result for your lilacs because the water that is mixed with will activate this fertilizer immediately after being applied.
|Miracle-Gro Water Soluble Plant Food Specifications|
1.5 lbs. feeds approximately 600 sq. ft.
Feed every 1-2 weeks
The Miracle-Gro Water Soluble Plant Food is a water soluble plant food, so it can give your lilacs a fast improvement.
Best For Long-Lasting Blooms: Miracle-Gro Plant Food Spikes
- Straightforward to use
- Good price
- It’s very easy for the plastic caps to break
Normally, lilacs can bloom around 14 days from mid-to late spring, but you can last this time by using the Miracle-Gro Plant Food Spikes. Both manufacturer and customers said that this product can last longer blooms, even if it can encourage more blooms next year.
|Miracle-Gro Plant Food Spikes Specifications|
Improves vibrant color and lush foliage
The Miracle-Gro Plant Food Spikes can help your lilacs bloom longer than using other fertilizers.
Best For Lush Foliage: Jobe’s Fertilizer Spikes
- Easy to apply and use
- Good price
- Allergic reaction - requires you wear a pair of gloves while applying
Although most people just care about the flowers of lilacs, foliage plays a vital role in an aesthetic lilac bush.
If your lilacs show yellow leaves, which is a sign of lacking the nutrients for the growth of lush foliage, buy the Jobe’s Fertilizer Spikes that have 16-4-4 NPK ratio. Thanks to a high content of nitrogen, your lilacs can produce more proteins to create new tissues of foliage.
|Jobe’s Fertilizer Spikes Specifications|
The Jobe’s Fertilizer Spikes are good for the growth of lush foliage to get a beautiful look when combined with flowers.
Best For Soil Enhancement: MARPHYL Organic Liquid Fertilizer
- Easy to mix
- Effective on making your flowers more beautiful
- A very strong fishy smell
Before growing lilacs, make a soil test. If your soil has a poor quality, you can improve its quality by using the MARPHYL Organic Liquid Fertilizer. To drench your soil, let you mix it with water, then pour the solution over the soil until saturated. Besides, this product also promotes vibrant colors and increases blooms of lilac flowers.
|MARPHYL Organic Liquid Fertilizer Specifications|
Natural and organic ingredients
The MARPHYL Organic Liquid Fertilizer can both improve the quality of your soil and make lilac flowers prettier.
Fertilizer & Insecticide Combo: BioAdvanced Granules
- Effortless to use
- Make your flowers more beautiful
- Not safe on edible plants
Do your lilacs suffer from 2 problems at the same time: lacking nutrients for a complete development and being attacked by insects and bugs?
If so, there is no need to buy each kind of product to treat each problem. Instead, you can invest in the BioAdvanced Granules that is a fertilizer & insecticide combo. While it can kill 40 species of insects and protect your plants within one year, this product also feeds your lilacs at the same time.
|BioAdvanced Granules Specifications|
Protects your plants from attackers within 12 month
The BioAdvanced Granules is a fertilizer & insecticide combo, so it can not only feed your plants but also kill many species of insects.
Best For Root Growth: Scotts Plant Food
- Easy to spread, use, and apply
- Useful directions
In case your lilacs have a weak root system, you can save or improve its condition by applying the Scotts Plant Food. Apart from the flower improvement, the manufacturer said that this product can encourage the growth of roots and lush foliage because all nutrients in this fertilizer are high (11-7-7).
For the best outcome, it’s better to rake it into 1-3 inches of the soil top, which allows all nutrients to release to the roots directly without burning your lilacs.
|Scotts Plant Food Specifications|
Feeds for up to 2 months
Easy to use
The Scotts Plant Food can help you improve the growth of root, foliage, and flowers because of its high N, P, K.
How To Choose The Best Fertilizer For Lilacs?
How Much NPK Ratio Does Lilacs Need?
Any fertilizer has the information about NPK ratio on the label. It includes 3 numbers, showing the proportions of nitrogen (N), phosphorus (P), and potassium (K) of the product.
- Nitrogen (N) helps your plants produce proteins that play an important role in creating new tissues of foliage. The lack of nitrogen leads to yellow and pale green leaves.
- Phosphorus (P) can stimulate the growth of the root system to set buds, flowers and produce seeds. This nutrient also helps your plants use other ingredients more efficiently and turn the sunlight into usable energy.
- Potassium (K) will promote the overall vigor of your plants by creating carbohydrates, improving disease resistance, regulating metabolic activities. If your plants lack potassium, it will be stunted with lower yields.
To choose a product with suitable proportions, you need to understand what lilacs need.
It’s very important to choose a fertilizer with high proportions of phosphorus and potassium, which provides your lilacs with a healthy root system, vibrant foliage, a bounty of blooms, and protection against diseases and pests. Nitrogen (N) is also essential because it contributes to the growth of foliage that makes your lilac bush more beautiful. However, the necessity of this ingredient is to a lesser extent. A fertilizer with nitrogen only results in having a lot of green leaves and very few blooms.
If a soil test shows that your soil is poor quality or lacks nitrogen or iron, choose a product with a high content of nitrogen to compensate.
What Is The Best Type Of Fertilizer For Lilacs?
To answer this question, you need to learn about each of them:
This is the liquid and water-soluble form. You can directly apply it around the base of your plants or spray it to provide your plants with nutrients immediately. This can improve quickly for ailing plants in poor soil. Although this way brings a fast result, it’s straightforward to overfeed, leading to root burn.
These are heavily concentrated forms: granules and spikes which provide plants with nutrients over an extended period, so it’s more eco-friendly.
Though different products will give different results, granules are so slow-releasing that it can provide your plants with nourishment for up to 9 months continuously. It is less likely to result in root burn. After applying, these granules will do everything, so there is no need to use the water for activating.
If you grow your lilacs in containers, spikes are more convenient to use. No matter which size you choose, it’s very easy to push them into loamy soil. This solution is also slow-releasing, so it has a low risk of root burn. Natural microorganisms in the soil will release them, so there is no need to use the water. Moreover, this solution can stimulate and increase the resistance to disease and pests.
This solution is safe because it is made from natural compounds such as well-degraded plant material and animal bi products, containing beneficial levels of NPK.
Inorganic fertilizers are produced with minerals and chemicals. They work well in a high yield, but soil and nearby water sources can be contaminated.
Which Brands Make The Best Fertilizer For Lilacs?
Trammo was founded in 1965 by Ronald Stanton. While their headquarters are located in New York City, they also have other offices in Asia, South America, North America, Africa, and Europe. This brand is the biggest private fertilizer trading company all over the world.
Terra Nitrogen Company
This company was founded in 1990. Their headquarters are located in Deerfield. This brand is famous for selling nitrogen fertilizers (ammonium urea nitrate and anhydrous ammonia solutions). Nowadays, they have also produced phosphate fertilizers.
Scotts Miracle-Gro Company
Scotts Miracle-Gro Company was established in 1868 with the headquarters in Marysville. This brand is famous in Asia Pacific, North America, and Europe because of their high-quality products. They mainly produce and sell lawn and garden care products such as outdoor cleaners, spreaders, lawn fertilizers, and grass seed products, even weed, pest, and disease control items.
Sigma AgriScience, LLC
Sigma AgriScience is a fertilizer company with headquarters in Texas. This brand that is engaged in agricultural fertilizer production provides granular organic fertilizers, granular bio-fertilizers, liquid bio-stimulants for organic farming, conventional farming, turf, orchard, greenhouse, nursery, and landscape markets. In particular, they also offer biotechnology items.
California Organic Fertilizers, Inc
California Organic Fertilizers, Inc that was founded in 1990 with its headquarters in California has manufactured liquid and dry fertilizers to apply in organic farming operations. They sell dry organic fertilizers, liquid NPK fertilizers, adjuvants, plant nutrients, lawn and garden natural products, top-quality control products, and organic pesticides.
When should you fertilize lilacs?
The ideal time to fertilize lilacs is early spring. At this time, if you provide your lilacs with a boost of nutrients, they can grow and bloom successfully. In case you miss this ideal time, making your lilacs unhealthy, you can fertilize later in the season. Pay attention to avoid fertilizing lilacs during the hottest part of summer unless you want to stress out your lilacs.
How often do you fertilize lilacs?
Don’t fertilize your lilacs more than once per year.
Can fertilizers keep lilacs blooming all summer?
Yes, but you have to use a suitable product and fertilize it at the right time in the proper way.
Can fertilizer rejuvenate an old lilac bush?
Instead of using a fertilizer, you can reinvigorate an old lilac bush by pruning out ⅓ of old canes. This method boosts new growth while still allowing the growth of the blooms.
Do lilacs need a lot of fertilizer?
Lilacs don’t need a lot of fertilizer.
Is it vital to choose the best fertilizer for lilacs? Can you use any product to feed them? Knowing what your lilacs needs can provide them with the right nutrients with the right ratio. For example, if you need to promote the growth of flowers and blooms, choose a fertilizer with a high content of phosphorus (P). In case your lilacs’ leaves are lacking nutrients, choose an item with a high level of nitrogen (N). Once you understand the importance of the best fertilizer for lilacs, you can make a purchase now. Don't forget to tell me about your decision by leaving a comment below.