---
product_id: 26946821
title: "Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer, 1.5lb"
brand: "jack's classic"
price: "€ 108.31"
currency: EUR
in_stock: true
reviews_count: 13
category: "Jack's Classic"
url: https://www.desertcart.be/products/26946821-jacks-classic-7-3-3-hydrangea-blue-water-soluble-fertilizer
store_origin: BE
region: Belgium
---

# Micronutrients for optimal plant health Water-soluble powder for easy mixing 7-3-3 NPK for vibrant blue blooms Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer, 1.5lb

**Brand:** jack's classic
**Price:** € 108.31
**Availability:** ✅ In Stock

## Summary

> 🔵 Elevate your garden game with the ultimate blue bloom booster!

## Quick Answers

- **What is this?** Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer, 1.5lb by jack's classic
- **How much does it cost?** € 108.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/26946821-jacks-classic-7-3-3-hydrangea-blue-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

- • **Complete Nutrition:** Micronutrients included to support vigorous growth without extra supplements.
- • **Boost Blue Brilliance:** Special 7-3-3 formula enhances and maintains stunning blue hydrangea flowers.
- • **Economical Concentrate:** Powdered formula stretches further than liquids—mix once, feed gallons of lush growth.
- • **Dual Feeding Flexibility:** Use as foliar spray or root feed to fit your gardening style and maximize nutrient uptake.
- • **Precision Dosing Included:** Comes with a measuring spoon for perfect nutrient balance every time—no guesswork.

## Overview

Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer is a 1.5lb powdered concentrate designed to promote lush foliage and vibrant blue flowers in hydrangeas. Its versatile application allows for foliar or root feeding, and it includes essential micronutrients for optimal plant health. The included measuring spoon ensures precise mixing, making it a top choice for gardeners seeking consistent, eye-catching blue blooms.

## Description

Heavy-duty metal construction. Built-in flow control. Slip-resistant rubberized grip, trigger and head. Easy, one finger trigger lock. Seven different spray patterns.

Review: Awesome product with the best deep blue hydrangeas ever. - I have been using this for about a month & the soil where I live does not facilitate blue hydrangeas. This is the result of using this product & it's amazing!!! I tried other ones & this is the absolute best!!
Review: Great product - My hydrangeas bushes were looking a little sad, so I applied this plant food as soon as I received it and I now have many new buds. It mixed easily with water & I'm so looking forward to beautiful new, blue flowers. Shipping was fast & I'm impressed with this seller.

## Features

- 7-3-3 Analysis - Great for promoting lush leaves and enhance and maintain blue color in many pink and blue varieties of hydrangeas.
- Many Ways to Feed - Hydrangea Blue 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 | B00KX028LQ |
| Application Method | foliar or root feeding |
| Best Sellers Rank | #70,386 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,560 in Garden Fertilizers |
| Brand | Jack's Classic |
| Brand Name | Jack's Classic |
| Coverage | Medium |
| Customer Reviews | 4.5 out of 5 stars 642 Reviews |
| Global Trade Identification Number | 00671341593249 |
| Included Components | 1 Container |
| Item Form | Powder |
| Item Weight | 1.5 pounds |
| Liquid Volume | 1.5 liters |
| Manufacturer | JR Peters |
| Mixing Ratio | 7:3:3 |
| Model Number | 59324 |
| Number of Items | 1 |
| Part Number | 59324 |
| Specific Uses For Product | Hydrangea care, promoting blue flower growth |
| Target Species | Hydrangea |
| UPC | 671341593249 671341593256 |
| Unit Count | 24 Ounce |

## Product Details

- **Brand:** Jack's Classic
- **Item Form:** Powder
- **Item Weight:** 1.5 pounds
- **Liquid Volume:** 1.5 liters
- **Specific Uses For Product:** Hydrangea care, promoting blue flower growth

## Images

![Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer, 1.5lb - Image 1](https://m.media-amazon.com/images/I/71eX7vl0rpL.jpg)
![Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer, 1.5lb - Image 2](https://m.media-amazon.com/images/I/8162l63QsSL.jpg)
![Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer, 1.5lb - Image 3](https://m.media-amazon.com/images/I/81Iqx4GycoL.jpg)
![Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer, 1.5lb - Image 4](https://m.media-amazon.com/images/I/81a7aICqPnL.jpg)
![Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer, 1.5lb - Image 5](https://m.media-amazon.com/images/I/81P6w3bxFKL.jpg)

## Questions & Answers

**Q: Your descriuption is completely wrong for this product! It sounds like the description for a hose!**
A: Yes, this looks like the wrong info for this product. The product is great, but it is for Hydrangea flowers, this is not a garden tool.

**Q: Will this turn pink hydrangeas blue?**
A: I used it late winter early spring and every flower is now blue-purple.  I just noticed in mid July pink flowers are coming again so I will add some more

**Q: Is this good for bigleaf hydrangeas?**
A: I guess I don’t Know the difference. But I would expect it to be good for hydrangeas in general🤷🏼‍♀️
Sorry I can’t be of more help to a fellow gardner

**Q: Silly question, when it suggests 1 tablespoon per gallon of water or table per gallon of root ball?**
A: It means to use 1 tablespoon per gallon of water to use watering around the root ball area.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Awesome product with the best deep blue hydrangeas ever.
*by B***G on August 13, 2024*

I have been using this for about a month & the soil where I live does not facilitate blue hydrangeas. This is the result of using this product & it's amazing!!! I tried other ones & this is the absolute best!!

### ⭐⭐⭐⭐⭐ Great product
*by N***N on February 17, 2022*

My hydrangeas bushes were looking a little sad, so I applied this plant food as soon as I received it and I now have many new buds. It mixed easily with water & I'm so looking forward to beautiful new, blue flowers. Shipping was fast & I'm impressed with this seller.

### ⭐⭐⭐⭐ No blue!
*by J***E on July 29, 2024*

Have been using this for several weeks my Hydrangeas are still not turning blue.

## Frequently Bought Together

- Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer with Micronutrients to Enhance Blue Flowers, 1.5lbs
- GARDENWISE Slow Release Hydrangea Fertilizer with Iron & Sulfur – Indoor & Outdoor Soil Acidifier for Miracle Growth (12 oz)
- TPS NUTRIENTS Hydrangea Fertilizer for Acid Loving Plants, Liquid Plant Food 8 oz (250mL)

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*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-08-30*