---
product_id: 3764567
title: "Water Soluble Bloom Booster Flower Food Fertilizer - 10-52-10 Formula for Annuals Perennials and Containers - Promotes Vibrant Flowers and Rich Color, 4 lbs."
brand: "miracle-gro"
price: "€ 39.08"
currency: EUR
in_stock: true
reviews_count: 10
category: "Miracle Gro"
url: https://www.desertcart.ie/products/3764567-water-soluble-bloom-booster-flower-food-fertilizer-10-52-10
store_origin: IE
region: Ireland
---

# Instant water-soluble feeding High-phosphorus 10-52-10 formula Feeds up to 1,600 sq. ft. per 4 lb. box Water Soluble Bloom Booster Flower Food Fertilizer - 10-52-10 Formula for Annuals Perennials and Containers - Promotes Vibrant Flowers and Rich Color, 4 lbs.

**Brand:** miracle-gro
**Price:** € 39.08
**Availability:** ✅ In Stock

## Summary

> 🌺 Unlock your garden’s full bloom potential—don’t let your flowers miss out!

## Quick Answers

- **What is this?** Water Soluble Bloom Booster Flower Food Fertilizer - 10-52-10 Formula for Annuals Perennials and Containers - Promotes Vibrant Flowers and Rich Color, 4 lbs. by miracle-gro
- **How much does it cost?** € 39.08 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/3764567-water-soluble-bloom-booster-flower-food-fertilizer-10-52-10)

## Best For

- miracle-gro enthusiasts

## Why This Product

- Trusted miracle-gro brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bloom Like a Pro:** Boost your garden’s color with a phosphorus-rich formula designed for vibrant, abundant blooms.
- • **Feed Fast, See Fast:** Water-soluble powder dissolves instantly, delivering nutrients that kickstart flower growth immediately.
- • **Versatile Garden Hero:** Perfect for containers, hanging baskets, and in-ground beds—your all-in-one bloom booster.
- • **Season-Long Brilliance:** Feed every 7-14 days to maintain a nonstop parade of stunning flowers all season long.
- • **Safe & Easy Application:** Gentle on plants when used as directed, with no risk of burning—confidence in every feed.

## Overview

Miracle-Gro Water Soluble Bloom Booster Flower Food features a potent 10-52-10 NPK formula with high phosphorus to promote more vibrant and abundant blooms. This fast-acting, water-soluble fertilizer feeds flowering annuals and perennials instantly, suitable for containers, hanging baskets, and garden beds. Each 4 lb. box covers approximately 1,600 sq. ft., with recommended feeding every 7-14 days for continuous color. Safe and easy to use, it’s a trusted choice for gardeners seeking quick, spectacular floral results.

## Description

Get ready to fill your garden with spectacular, vibrant color with Miracle-Gro Water Soluble Bloom Booster Flower Food. This formula is your secret to growing more blooms for greater color (vs unfed plants). Our 10-52-10 NPK formula features a boost in phosphorus specifically designed to help your flowering annuals and perennials. The water-soluble flowering plant fertilizer dissolves instantly in water and gets to work right away, feeding your plants for quick, beautiful results. It's the perfect food for your flower garden, whether you're growing in containers, hanging baskets, or in-ground garden beds. Application is simple: just mix flower food with water in a watering can or apply using the Miracle-Gro Garden Feeder. For a stunning show of color all season long, feed your plants every 7 to 14 days. It's safe to use with all plants and guaranteed not to burn when used as directed, so you can feed with confidence. This 4 lb. container of Miracle-Gro Water Soluble Bloom Booster Flower Food feeds approximately 1,600 sq. ft. of garden.

Review: BloomTastic Works as Stated! - I enjoy the miracle grow. This is a great bargain for 5.5 pounds because this stuff is really expensive. It really does a great job. I’m growing up multiple different types of chili in McAllen Texas and this has got them fruiting. Chili Arbol chili piquin chil Guajillo. Very good stuff easy to administer good results in a couple weeks.
Review: Best fertilizer for all blooming plants to attract butterflies and hummingbirds - I’ve been using Miracle Gro products for many years, and the Bloom Booster Flower Food is the best fertilizer I’ve used for blooming plants. It produces big beautiful blooms and healthy green leaves. The granules dissolve easily in cold water for ease of use. I measure two tablespoons of granules with the included measuring spoon for each gallon-sized watering can and apply the solution every two weeks. I store the granules in a mason jar to keep out humidity and for easy scooping. I tend to over fertilize, but it hasn’t caused any issues although some reviewers have said to start using at half strength to see how your plants react. Always apply at the base of the plant and avoid wetting leaves especially in bright sunlight but I have never had a.problem with it burning them. Blooming plants need a high-phosphorus fertilizer for strong blooms, and this product is the most effective I’ve used. I’ve applied this product on roses, flowering shrubs, annual and perennials plants in flower beds, pots and hanging baskets with superior results each time. A noticeable difference in appearance, color of blooms and health of plants is evident within a week or two after the first application. I do use a specialized fertilizer on my orchids and Venus fly traps. Besides gardening my other passion is wildlife photography and I have a lot of flowering plants outside every summer to attract them. My photo shows a Swallowtail butterfly sipping nectar from a lantana plant in a hanging basket on my deck last summer. (The preferred flower of butterflies and hummingbirds.) and I only trust Miracle Gro products to keep them coming back for more. The price for the 4lb. size that I purchased for $7.59 is highly competitive and represents substantial value, comparable to that offered by most home and garden centers. Ordering larger sizes on occasion offers better value which suits my frequent outdoor gardening needs. The item arrived on time, well-packaged, and in great condition. Highly recommended.

## Features

- Promotes Beautiful Blooms: Miracle-Gro Water Soluble Bloom Booster Flower Food has a high-phosphorus formula to help all your flowering annuals and perennials produce more blooms for greater color (vs unfed plants)
- Our flower fertilizer feeds instantly to promote quick and beautiful results
- Ideal for Containers and In-Ground Beds: This is the perfect food for all your flowering plants from your potted annuals to hanging baskets to in-ground perennial flower beds
- Instant Feeding: This 10-52-10 flowering plant fertilizer starts working right away by giving your flowering plants the nutrients they need for quick, beautiful results
- Feed Every 1-2 Weeks: For a season full of stunning color, feed your flowers every 7-14 days; this 4 lb. box of flower fertilizer feeds approximately 1,600 sq. ft. of garden area

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00C4TPN7K |
| Best Sellers Rank | #2,542 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #124 in Garden Fertilizers #639 in Pest Control Products |
| Brand | Miracle-Gro |
| Customer Reviews | 4.8 4.8 out of 5 stars (8,932) |
| Global Trade Identification Number | 07129984811532 |
| Is Discontinued By Manufacturer | No |
| Item Form | Powder |
| Item Weight | 8 ounces |
| Item model number | Miracle Gro - 146002 |
| Liquid Volume | 4 Liters |
| Manufacturer | The Scotts Company LLC |
| Number of Items | 1 |
| Product Dimensions | 4.75 x 4.75 x 9.5 inches |
| Specific Uses For Product | Flowering annuals and perennials, containers, window boxes |
| UPC | 073561460019 720698810568 720698840619 |
| Unit Count | 64.0 Ounce |

## Product Details

- **Brand:** Miracle-Gro
- **Item Form:** Powder
- **Item Weight:** 8 ounces
- **Liquid Volume:** 4 Liters
- **Specific Uses For Product:** Flowering annuals and perennials, containers, window boxes

## Images

![Water Soluble Bloom Booster Flower Food Fertilizer - 10-52-10 Formula for Annuals Perennials and Containers - Promotes Vibrant Flowers and Rich Color, 4 lbs. - Image 1](https://m.media-amazon.com/images/I/715ONFm9KtL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What is the n-p-k for this product? i'm surprised it's not mentioned in the product description. thank you.**
A: Definitely NOT 10-52-10. This product is the 5.5lb box. It's npk is 15-30-15. This is not mentioned in the description which it should be. I bought this thinking it was 10-52-10. I'm totally bummed because this is the 2nd time I've placed this order only to find that the npk is either not mentioned or is different. NOT COOL!!!

**Q: Why is this superior to regular Miracle-Gro for flowering window baskets?**
A: Fertilizers have three numbers: NPK: Nitrogen(N)-Phosphorous(P)-Potassium(K): Nitrogen assists the plant grow more leaves, Phosphorous is good for flower production, and Potassium is good for overall health of the plant. The regular all purpose Miracle Grow's numbers are:24-8-16 whereas the Bloom Booster's ratings are: 10-52-10. Bloom Booster has relatively more Phosphorous; thus it is expected to help the plant to grow more buds and fruits. I use it about 1/3 rd spoon ( a weak solution) per gallon for my container plants almost alternate days with great results.

**Q: is this product good for vegetable blossoms and setting fruit**
A: Absolutely!  The Bloom Booster is heavy on the nutrient that 1, develops roots and root systems and 2, helps in the development of the blossoms/flowers that develop into fruits and vegetables.

**Q: Can it be used for indoor pot plant?**
A: What kind of pot?Works great for me.Youcan also spray on leafs,but not when flowering.

## Customer Reviews

### ⭐⭐⭐⭐⭐ BloomTastic Works as Stated!
*by T***D on October 31, 2025*

I enjoy the miracle grow. This is a great bargain for 5.5 pounds because this stuff is really expensive. It really does a great job. I’m growing up multiple different types of chili in McAllen Texas and this has got them fruiting. Chili Arbol chili piquin chil Guajillo. Very good stuff easy to administer good results in a couple weeks.

### ⭐⭐⭐⭐⭐ Best fertilizer for all blooming plants to attract butterflies and hummingbirds
*by E***T on December 15, 2025*

I’ve been using Miracle Gro products for many years, and the Bloom Booster Flower Food is the best fertilizer I’ve used for blooming plants. It produces big beautiful blooms and healthy green leaves. The granules dissolve easily in cold water for ease of use. I measure two tablespoons of granules with the included measuring spoon for each gallon-sized watering can and apply the solution every two weeks. I store the granules in a mason jar to keep out humidity and for easy scooping. I tend to over fertilize, but it hasn’t caused any issues although some reviewers have said to start using at half strength to see how your plants react. Always apply at the base of the plant and avoid wetting leaves especially in bright sunlight but I have never had a.problem with it burning them. Blooming plants need a high-phosphorus fertilizer for strong blooms, and this product is the most effective I’ve used. I’ve applied this product on roses, flowering shrubs, annual and perennials plants in flower beds, pots and hanging baskets with superior results each time. A noticeable difference in appearance, color of blooms and health of plants is evident within a week or two after the first application. I do use a specialized fertilizer on my orchids and Venus fly traps. Besides gardening my other passion is wildlife photography and I have a lot of flowering plants outside every summer to attract them. My photo shows a Swallowtail butterfly sipping nectar from a lantana plant in a hanging basket on my deck last summer. (The preferred flower of butterflies and hummingbirds.) and I only trust Miracle Gro products to keep them coming back for more. The price for the 4lb. size that I purchased for $7.59 is highly competitive and represents substantial value, comparable to that offered by most home and garden centers. Ordering larger sizes on occasion offers better value which suits my frequent outdoor gardening needs. The item arrived on time, well-packaged, and in great condition. Highly recommended.

### ⭐⭐⭐⭐⭐ You can use it often if you dilute it enough
*by T***Y on March 9, 2026*

Works as it says it does, makes flowers bloom bigger, and more of them. My clivia plant hasn't bloomed in many years and now it's blooming profusely. Only fertilized once and the results were amazing.

## Frequently Bought Together

- Miracle-Gro Water Soluble Bloom Booster Flower Food
- Miracle-Gro Water Soluble All Purpose Plant Food, Fertilizer for Indoor or Outdoor Flowers, Vegetables or Trees, 3 lbs.
- Miracle-Gro Garden Feeder with Water Soluble All Purpose Plant Food, Hose-end Feeder for Outdoor Plants, 1 lb.

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-21*