---
product_id: 26946821
title: "Jack's Classic 7-3-3 Hydrangea Blue Water-Soluble Fertilizer, 1.5lb"
brand: "jack's classic"
price: "€ 47.30"
currency: EUR
in_stock: true
reviews_count: 13
category: "Jack's Classic"
url: https://www.desertcart.ie/products/26946821-jacks-classic-7-3-3-hydrangea-blue-water-soluble-fertilizer
store_origin: IE
region: Ireland
---

# Micronutrients for lush, healthy leaves 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:** € 47.30
**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?** € 47.30 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/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

- • **Convenient Dosing:** Comes with a measuring spoon for hassle-free, accurate fertilizer preparation.
- • **All-in-One Nutrition:** Includes essential micronutrients so your hydrangeas thrive without extra feeding.
- • **Precision Blue Boost:** Special 7-3-3 formula enhances and maintains stunning blue hydrangea flowers.
- • **Economical Concentrate:** Powdered formula stretches further than liquids—mix multiple gallons from one container.
- • **Dual Feeding Flexibility:** Use as foliar spray or root drench to fit your plant care routine perfectly.

## Overview

Jack's Classic 7-3-3 Hydrangea Blue Fertilizer is a water-soluble powder designed to promote vibrant blue flowers and lush foliage in hydrangeas. Its balanced 7-3-3 NPK ratio, enriched with micronutrients, supports optimal plant health and color enhancement. Suitable for foliar or root feeding, this concentrated formula offers flexible application and comes with a measuring spoon for precise mixing, making it a top choice for acid-loving hydrangea enthusiasts.

## 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 | #105,519 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,970 in Garden Fertilizers |
| Brand | Jack's Classic |
| Brand Name | Jack's Classic |
| Coverage | Medium |
| Customer Reviews | 4.5 out of 5 stars 643 Reviews |
| Global Trade Identification Number | 00671341593249 |
| Included Components | 1 Container |
| Item Form | Powder |
| Item Highlight | Powdered, Targeted Micronutrient Package, Turns Hydrangeas Blue and Promotes Lush Leaves, for Acid-Loving Plants, Root Drench |
| 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 Ireland*
*Store origin: IE*
*Last updated: 2026-09-08*