Jack's Classic 10-30-20 Blossom Booster
Best bloom booster for gardeners seeking vibrant, abundant floral displays.
Jack's Classic 10-30-20 Blossom Booster is a water-soluble fertilizer designed to promote abundant flowering and fruit production. With a high phosphorus content, it provides essential nutrients for blooming plants, vegetables, and roses. This synthetic fertilizer is ideal for use during the blooming and fruiting stages, applied through fertigation or as a foliar spray. It comes in a convenient 4 lb. plastic tub, offering a reliable solution for gardeners seeking to enhance their plants' floral displays and yields.
$24.99
Owner Satisfaction
4.6
/ 5
Category Rank
1939
/ 4425
#1939 in Fertilizers
Price vs Category Average
-59%
Below average
NPK Ratio
103020
/ --
Who it's for
- Gardeners seeking vibrant flowers and increased fruit or vegetable yields.
- Busy plant enthusiasts desiring convenient and efficient nutrient delivery.
- Growers who value consistent quality and proven effectiveness in their plant care products.
Who should skip it
- Gardeners needing an all-purpose fertilizer for general plant health.
- Novice plant parents or those preferring less precise application methods.
- Advanced growers managing complex nutrient regimens or specific soil types.
Performance breakdown
Bloom stimulation
High phosphorus ratio drives exceptional flower and fruit development.
Dissolution speed
Water-soluble powder integrates seamlessly into irrigation systems without clogging.
Application versatility
Flexible usage options allow for both root feeding and foliar absorption.
Nutrient density
Concentrated formula delivers a potent punch for heavy-feeding garden varieties.
Packaging utility
Sturdy plastic tub keeps the powder dry and easy to scoop.
Targeted efficacy
Specifically engineered to maximize yields in roses and vegetable crops.
Key Specs
NPK Ratio
10-30-20
Form
Water Soluble Powder
Package Weight
4 lb.
Intended Use
Flowering plants, vegetables, roses
Application Method
Fertigation, Foliar spray
Release Type
None specified
Season of Use
Spring, Summer, Fall
Water Soluble
Yes
Features
- Promotes abundant flowering and fruit production
- High phosphorus content for blooming plants
- Suitable for vegetables, roses, and flowering plants
- Water-soluble for easy application
- Can be applied via fertigation or foliar spray
What customers say
Gardeners consistently laud this blossom booster for its exceptional effectiveness in promoting abundant, vibrant blooms. Users frequently report seeing significant improvements in flower production and overall plant vitality, often with noticeable results in a short period. Its straightforward application is also a key highlight, making it incredibly easy to mix and use. This product is highly valued by those seeking to maximize their plants' flowering potential with minimal effort.
Know before you buy
The high phosphorus content (30%) is specifically formulated to stimulate bud development and enhance flower and fruit production. It is designed to be used once your plants have moved past the initial vegetative growth stage and are ready to bloom.
Yes, it is highly effective for fruiting vegetables like tomatoes, peppers, and squash. The nutrient profile helps support the energy-intensive process of fruit development.
Fertigation involves mixing the fertilizer into your irrigation water to feed the roots directly, which is the most efficient way to deliver nutrients to the entire plant. A foliar spray involves misting the leaves, which allows for faster nutrient absorption but should be done carefully to avoid leaf burn.
You should begin applying this fertilizer as soon as you see the first signs of flower buds or when your plants enter their blooming and fruiting phase. It is intended for use throughout the spring, summer, and fall.
Yes, it is well-suited for roses and other flowering shrubs. The balanced potassium content helps improve overall plant health and bloom quality, making it a reliable choice for rose enthusiasts.
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$25