---
product_id: 624658891
title: "13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart)"
brand: "gardenwise"
price: "$55"
currency: NZD
in_stock: true
reviews_count: 8
category: "Gardenwise"
url: https://www.desertcart.nz/products/624658891-13-13-13-slow-release-granular-fertilizer-all-purpose-plant
store_origin: NZ
region: New Zealand
---

# Feeds up to 8 weeks slow-release Boosts roots, foliage & blooms 13% N-P-K balanced formula 13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart)

**Brand:** gardenwise
**Price:** $55
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow smarter, not harder — feed your garden the balanced way!

## Quick Answers

- **What is this?** 13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart) by gardenwise
- **How much does it cost?** $55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/624658891-13-13-13-slow-release-granular-fertilizer-all-purpose-plant)

## Best For

- gardenwise enthusiasts

## Why This Product

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

## Key Features

- • **Flexible Size Options:** From small 1/2 quart bags to large 20 quart packs—tailored to fit any garden size or project.
- • **Easy Granular Application:** Fine granules ensure even distribution and maximum nutrient absorption, beginner-friendly and pro-approved.
- • **Long-Lasting Slow Release:** One application feeds your garden continuously for up to 8 weeks—less work, more growth.
- • **Versatile All-Purpose Use:** Perfect for vegetables, roses, shrubs, trees, and even potted plants—your garden’s ultimate multitasker.
- • **Balanced 13-13-13 Nutrient Power:** Optimal 13% Nitrogen, Phosphorus & Potassium for all outdoor plants and lawns.

## Overview

Gardenwise 13-13-13 Slow Release Granular Fertilizer delivers a perfectly balanced blend of nitrogen, phosphorus, and potassium to support robust root development, lush foliage, and vibrant blooms. Its slow-release formula feeds plants continuously for up to 8 weeks, reducing the need for frequent applications. Suitable for a wide range of outdoor plants including lawns, vegetables, flowers, shrubs, and trees, this easy-to-apply granular fertilizer comes in multiple sizes to fit any gardening need.

## Description

desertcart.com : Gardenwise 13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart) : Patio, Lawn & Garden

Review: great product from a good company - I like this fertilizer, it really helped my Lemon and Banana plants. I personally did not notice any smell as others have stated. The blue color is interesting, I cannot verify the content, but my plants perked up not to long after application.
Review: A little goes a long way! - So far, so good. Works well for all of my indoor plants. High concentration so you only use a small amount. Packaging it came in was well done.

## Features

- 🌿 Balanced 13-13-13 Fertilizer for Outdoor Plants: Provides 13% Nitrogen, 13% Phosphorus, and 13% Potassium for optimal growth. Perfect for lawns, vegetable gardens, rose bushes, flowers, shrubs, and trees. Ideal for St. Augustine grass, evergreens, and all outdoor plants.
- ⏳ Slow-Release Formula for Continuous Feeding: Feeds plants and grass for up to 8 weeks with one application. Ideal for lawns, flower beds, vegetable gardens, and potted plants. Fewer applications, healthier plants!
- 🌼 Promotes Strong Roots, Lush Foliage, and Vibrant Blooms: Phosphorus develops deep roots, Nitrogen fuels green growth, and Potassium boosts resilience. Great for roses, tomatoes, peppers, herbs, and flowers. Enjoy thriving plants and abundant harvests!
- 🌱 Easy-to-Apply Granules for Even Distribution: Fine granules ensure maximum soil contact and efficient nutrient absorption. Suitable for lawns, garden beds, vegetables, fruit trees, and flowering plants. Simple for beginners and pros alike!
- 🛍 Available in Multiple Sizes: Choose the perfect size for your needs – from 1/2 quart (1 lb) to 20 quarts (40 lbs). Ideal for small gardens, large lawns, and everything in between. Flexible options for all your gardening projects!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CQBYLRMH |
| Best Sellers Rank | #365 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #9 in Garden Fertilizers |
| Brand | GARDENWISE |
| Brand Name | GARDENWISE |
| Coverage | The application rate varies by plant type but is typically 2-3 pounds per 1000 square feet for lawns, gardens, and beds. |
| Customer Reviews | 4.6 out of 5 stars 3,761 Reviews |
| Included Components | 1 Bag of 13-13-13 Granular Fertilizer |
| Item Form | Granules |
| Item Weight | 1 Pounds |
| Liquid Volume | 0.5 Quarts |
| Manufacturer | Summit Sales Company LLC |
| Mixing Ratio | 1:1:1 |
| Model Number | GRN-13-13-13 |
| Specific Uses For Product | All Purpose and Starter Fertilizer |
| Target Species | Indoor and Outdoor Vegetables, Fruits, Flowers, Trees, Shrubs, and Lawns |
| UPC | 371127318706 |
| Unit Count | 16.0 Ounce |

## Product Details

- **Brand:** GARDENWISE
- **Item Weight:** 16 ounces
- **Item Form:** Granules
- **Liquid Volume:** 0.5 Quarts
- **Specific Uses For Product:** All Purpose and Starter Fertilizer

## Images

![13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart) - Image 1](https://m.media-amazon.com/images/I/81-syJ02u8L.jpg)
![13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart) - Image 2](https://m.media-amazon.com/images/I/814MtyA1cHL.jpg)
![13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart) - Image 3](https://m.media-amazon.com/images/I/81RmNUxv4EL.jpg)
![13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart) - Image 4](https://m.media-amazon.com/images/I/81n1dSAMdXL.jpg)
![13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart) - Image 5](https://m.media-amazon.com/images/I/81pEnIjgoPL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ great product from a good company
*by D***Y on January 16, 2026*

I like this fertilizer, it really helped my Lemon and Banana plants. I personally did not notice any smell as others have stated. The blue color is interesting, I cannot verify the content, but my plants perked up not to long after application.

### ⭐⭐⭐⭐⭐ A little goes a long way!
*by S***E on January 3, 2026*

So far, so good. Works well for all of my indoor plants. High concentration so you only use a small amount. Packaging it came in was well done.

### ⭐⭐⭐⭐⭐ Great fertilizer with great results!
*by M***A on November 26, 2025*

Great results for a flowering tree that was fading away. Within a couple of weeks after application of the fertilizer, leaves started to sprout fuller then orange blossoms started to bloom attracting hummingbirds and honey bees. A month later this flowering tree is flourishing. It should have been fertilized so much sooner.

## Frequently Bought Together

- Gardenwise 13-13-13 Slow Release Granular Fertilizer – All Purpose Plant Food 13 13 13 for Outdoor Grass, Vegetables, Roses, Flowers, Shrubs, Trees. Lawns, Gardens, Potted Plants (1/2 Quart)
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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-01-24*