Jack's 1-30-20 Blossom Booster
Best bloom booster for gardeners seeking vibrant, high-yield flowers and produce.
Jack's Blossom Booster 10-30-20 is a professional-grade water-soluble powder fertilizer designed to significantly enhance flower production and color vibrancy in all your indoor and outdoor plants. This trusted formula utilizes a proven 1:3:2 nutrient ratio, offering quality unmatched in the home gardener market. It effectively feeds plants through both foliar and root absorption, making it ideal for flowering annuals, vegetables, and fruits. Professional growers rely on this formula for full, blooming containers, ensuring excellent results for home gardeners.
$15.99
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4425
#50 in Fertilizers
Price vs Category Average
-74%
Below average
NPK Ratio
103020
/ --
Who it's for
- Gardeners seeking maximum flower production and bud density
- Growers focusing energy on blooms rather than foliage
- Users with automated irrigation or hydroponic systems
Who should skip it
- Gardeners nurturing young plants or leafy greens
- Casual hobbyists lacking precise measuring equipment
- Beginners prone to over-feeding their plants
Performance breakdown
Bloom stimulation
High phosphorus content triggers prolific flowering across a wide variety of species.
Nutrient absorption
Dual-action formula allows for rapid uptake through both foliage and roots.
Dissolution speed
Fine powder consistency ensures quick, residue-free mixing in standard watering cans.
Versatility
Equally effective for container flowers, vegetable patches, and indoor houseplants.
Professional reliability
Industry-standard formulation delivers consistent, predictable results for every gardener.
Application flexibility
Works seamlessly as a root drench or a targeted foliar spray.
Key Specs
NPK Ratio
10-30-20
Nutrient Ratio
1:3:2
Form
Water Soluble Powder
Fertilizer Source
Synthetic
Nitrogen Percentage
10%
Phosphorus Percentage
30%
Potassium Percentage
20%
Application Method
Foliar Spray, Soil Drench
Features
- Promotes abundant flowers and vibrant colors.
- Feeds plants through roots and leaves.
- Trusted by professional growers.
- Proven 1:3:2 nutrient ratio.
- Ideal for flowering plants.
- Benefits vegetables and fruits.
- Effective as a transplant solution.
What customers say
Customers overwhelmingly praise Jack's Blossom Booster for its exceptional effectiveness, noting rapid and dramatic improvements in flower production and plant health. The high concentration formula offers outstanding value, as a little product goes a long way. Users frequently highlight the product's solubility and ease of mixing, making application straightforward even for novice gardeners. This reliable performance and simple application process drive high satisfaction, positioning it as a staple for serious growers seeking superior bloom results.
Know before you buy
The high phosphorus content (30%) is specifically formulated to stimulate bud development and enhance bloom production. By providing a higher ratio of phosphorus compared to nitrogen, it encourages the plant to focus energy on flowers and fruit rather than just foliage growth.
Yes, this formula is excellent for fruiting vegetables like tomatoes, peppers, and squash. The nutrient profile supports the energy-intensive process of fruit production, leading to more abundant harvests.
You can use both methods effectively. A soil drench provides a steady supply of nutrients to the root system, while a foliar spray allows for rapid nutrient absorption through the leaves, which is useful for a quick boost.
Because this is a quick-release, water-soluble fertilizer, it is best applied regularly throughout the spring, summer, and fall. Always follow the specific dilution instructions on the packaging to avoid over-fertilizing your plants.
Yes, it is safe for indoor flowering houseplants. However, because it is a high-phosphorus formula designed for blooming, it is best reserved for plants that are currently in their active growth or flowering phase.
Yes, the formula is effective as a transplant solution. It helps reduce transplant shock by providing readily available nutrients that support root establishment and early growth.
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