---
product_id: 12049355
title: "Jack's Classic 10-30-20 Blossom Booster Water-Soluble Fertilizer with Micronutrients for Increasing Color and Quantity of Blooms in Flowering Plants, 4lbs"
brand: "jack's classic"
price: "€ 75.13"
currency: EUR
in_stock: false
reviews_count: 13
url: https://www.desertcart.it/products/12049355-jacks-classic-10-30-20-blossom-booster-water-soluble-fertilizer
store_origin: IT
region: Italy
---

# 10-30-20 NPK for vibrant blooms Water-soluble powder for max absorption Includes precise measuring spoon Jack's Classic 10-30-20 Blossom Booster Water-Soluble Fertilizer with Micronutrients for Increasing Color and Quantity of Blooms in Flowering Plants, 4lbs

**Brand:** jack's classic
**Price:** € 75.13
**Availability:** ❌ Out of Stock

## Summary

> 🌿 Unlock your garden’s full bloom potential with Jack’s Blossom Booster!

## Quick Answers

- **What is this?** Jack's Classic 10-30-20 Blossom Booster Water-Soluble Fertilizer with Micronutrients for Increasing Color and Quantity of Blooms in Flowering Plants, 4lbs by jack's classic
- **How much does it cost?** € 75.13 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/12049355-jacks-classic-10-30-20-blossom-booster-water-soluble-fertilizer)

## Best For

- jack's classic enthusiasts

## Why This Product

- Trusted jack's classic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Concentrated Power:** Powder form stretches further than liquids, delivering more feed per scoop.
- • **Micronutrient Magic:** Enhanced micronutrient blend supports strong roots and lush foliage without extra feeding.
- • **Precision Application:** Free measuring spoon ensures perfect mix every time, preventing waste and burn.
- • **Bloom Brilliance Boost:** High 10-30-20 nutrient ratio fuels brighter, more abundant flowers.
- • **Versatile Feeding Flexibility:** Use as foliar spray or root feed for targeted plant nourishment.

## Overview

Jack's Classic 10-30-20 Blossom Booster is a water-soluble, powder fertilizer designed to dramatically increase the color and quantity of blooms in flowering plants. Featuring a potent NPK ratio and enriched with essential micronutrients, it supports vigorous growth and strong roots. Its versatile application methods and included measuring spoon make precise feeding easy, while the concentrated powder formula ensures efficient use and long-lasting results.

## Description

Releases nutrients gradually for up to 4 months of vigorous growth. Blended with an enhanced micronutrient package which provides optimal nutrition for strong roots and green foliage. Features the highest safety factor to prevent burning when applied as directed. Free measuring spoon enclosed for easy and precise application.

Review: It does exactly what they say! Boom! Flowers! - This fertilizer is like magic on flowers and vegetable gardens. I mixed some up and applied to everything growing in my gardens, both flowers and vegetables. I swear the next day it was like magic! My tomatoes had buds, my butternut squash plants looked happy and almost an inch taller. The flowers, wow. Everything perked up and within just a few days things were starting to bloom, I mean BLOOM! Every plant benefited greatly from this fertilizer. I just ordered more
Review: MAGIC POWDER!! - I have always killed every single plant I buy in the summer every year! I can’t keep anything alive let alone have flowers! Well everything changed when I bought Jacks Blossom Booster! This stuff has taken me from dead flowers to new blooms and beautiful flowers everywhere! The beautiful hanging petunias I buy every year and kill every year are now bursting with flowers after only one use!! It comes in a powder form with a little scooper. Just measure the amount of water needed, scoop the powder and add to the water. I like to let it sit and dissolve in the water for a few minutes and stir it around to make sure the product doesn’t get wasted. Tip: When watering with the fertilizer add little amount to the soil at a time or else all the fertilizer water will go through at once and get wasted! Little slow amounts to let the plant absorb it all the way is key! Overall I will definitely be buying more of Jacks fertilizer in the future to help my flowers and my garden bloom all summer long!

## Features

- 10-30-20 Analysis - Great for producing brighter, more plentiful flowers in flowering plants.
- Many Ways to Feed - Blossom Booster can be used as a foliar or root feeding product. Great for spraying directly onto leaves, roots, or when used in a continuous feed system.
- Water-Soluble Powder – Powdered concentrates go further than liquid fertilizers. Simply mix your measured powder with water and you are ready to feed with multiple gallons of liquid fertilizer!
- Included Measuring Spoon – All Jack’s Classic fertilizers come with a convenient spoon to create the right amount of liquid fertilizer for your plants.
- Micronutrients - Added micronutrients supply your plant with the nutrition it needs for optimal growth and health. Unlike other fertilizers, additional feeding is not required.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00JDRWFF4 |
| Best Sellers Rank | #10,326 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #315 in Garden Fertilizers |
| Brand | Jack's Classic |
| Customer Reviews | 4.7 4.7 out of 5 stars (5,452) |
| Global Trade Identification Number | 00671341510642 |
| Is Discontinued By Manufacturer | No |
| Item Form | Powder |
| Item Weight | 4 pounds |
| Item model number | JRP79060 |
| Manufacturer | JR Peters |
| Number of Items | 1 |
| Product Dimensions | 6.5 x 6.5 x 6.5 inches |
| Specific Uses For Product | Fertilize plants |
| UPC | 671341510642 |
| Unit Count | 64.0 Ounce |

## Product Details

- **Brand:** Jack's Classic
- **Global Trade Identification Number:** 00671341510642
- **Item Form:** Powder
- **Item Weight:** 4 Pounds
- **Specific Uses For Product:** Fertilize plants

## Images

![Jack's Classic 10-30-20 Blossom Booster Water-Soluble Fertilizer with Micronutrients for Increasing Color and Quantity of Blooms in Flowering Plants, 4lbs - Image 1](https://m.media-amazon.com/images/I/41M4M78vctL.jpg)
![Jack's Classic 10-30-20 Blossom Booster Water-Soluble Fertilizer with Micronutrients for Increasing Color and Quantity of Blooms in Flowering Plants, 4lbs - Image 2](https://m.media-amazon.com/images/I/51IVVvV1G0L.jpg)
![Jack's Classic 10-30-20 Blossom Booster Water-Soluble Fertilizer with Micronutrients for Increasing Color and Quantity of Blooms in Flowering Plants, 4lbs - Image 3](https://m.media-amazon.com/images/I/51QJ6wW34AL.jpg)
![Jack's Classic 10-30-20 Blossom Booster Water-Soluble Fertilizer with Micronutrients for Increasing Color and Quantity of Blooms in Flowering Plants, 4lbs - Image 4](https://m.media-amazon.com/images/I/51igRMwtWcL.jpg)
![Jack's Classic 10-30-20 Blossom Booster Water-Soluble Fertilizer with Micronutrients for Increasing Color and Quantity of Blooms in Flowering Plants, 4lbs - Image 5](https://m.media-amazon.com/images/I/51p6CNWEr8L.jpg)

## Available Options

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

## Questions & Answers

**Q: What would be the correct amount to put in an old 1 lb miracle grow hose end sprayer?  1 lb of Jack's as with miracle gro amount of granules?**
A: Yes I believe that is correct. My bucket says 1 tablespoon per gallon of water. Hope that helps!

**Q: Can this fertilizer be used for edilbles like tomatoes?**
A: Yes, you can use this for edibles. It is my favorite for broccoli. I'm assuming you're concerned with toxicity to humans. It is strictly a fertilizer and has no pesticides or herbicides. Also, the nitrogen content is low enough so that it would not produce the excess foliage in tomato plants as could be a problem with a fertilizer with a higher nitrogen percentage. For plants like lettuce that are eaten for their leaves a fertilizer with more nitrogen would be closer to ideal or slightly more economical. I think the only reason that this fertilizer cannot bear the OMRI organic seal is that it uses a chelating agent called EDTA to enhance the absorption of some minerals. EDTA is also used in toothpaste, cosmetics, as a food preservative, and in EDTA therapy. Unless you are trying to get certified as an organic grower, I see not reason not to use Jack's.

**Q: Is this 4lb, or 1lb?  the bucket shows 4lb, but the description says 1lb??**
A: Good question. I was wondering the exact same thing. However, if you add it to your cart I see it shows 4 lbs. So it should be a 4 lbs container.

**Q: How many pounds in the package?**
A: Yes, it is four pounds. I have also bought a 25-lb bag from A. M. Leonard, but the shipping cost almost as much as the fertilizer. If you have a lot of plants or a fair sized garden, buying bigger could save some money. Also, as long as Jack's continues to use potassium sulfate as the potassium source it will be one of my preferred all purpose fertilizers. Similar products use much cheaper potassium chloride as their potassium source and that will degrade the taste of some vegetables.

## Customer Reviews

### ⭐⭐⭐⭐⭐ It does exactly what they say! Boom! Flowers!
*by C***N on June 10, 2025*

This fertilizer is like magic on flowers and vegetable gardens. I mixed some up and applied to everything growing in my gardens, both flowers and vegetables. I swear the next day it was like magic! My tomatoes had buds, my butternut squash plants looked happy and almost an inch taller. The flowers, wow. Everything perked up and within just a few days things were starting to bloom, I mean BLOOM! Every plant benefited greatly from this fertilizer. I just ordered more

### ⭐⭐⭐⭐⭐ MAGIC POWDER!!
*by L***N on June 11, 2024*

I have always killed every single plant I buy in the summer every year! I can’t keep anything alive let alone have flowers! Well everything changed when I bought Jacks Blossom Booster! This stuff has taken me from dead flowers to new blooms and beautiful flowers everywhere! The beautiful hanging petunias I buy every year and kill every year are now bursting with flowers after only one use!! It comes in a powder form with a little scooper. Just measure the amount of water needed, scoop the powder and add to the water. I like to let it sit and dissolve in the water for a few minutes and stir it around to make sure the product doesn’t get wasted. Tip: When watering with the fertilizer add little amount to the soil at a time or else all the fertilizer water will go through at once and get wasted! Little slow amounts to let the plant absorb it all the way is key! Overall I will definitely be buying more of Jacks fertilizer in the future to help my flowers and my garden bloom all summer long!

### ⭐⭐⭐⭐⭐ Great results
*by T***Y on November 18, 2025*

Love this stuff, my plants did too! Just wish is wasn’t so costly, so I use in between other feedings to help last longer.

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-01*