SKU: 16615363376
best slow release plant fertilizer

best slow release plant fertilizer Slow Release Fertiliser Pallets (1.2kg) by QPS – Quality Plants & Seedlings

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Description

best slow release plant fertilizer Slow Release Fertiliser Pallets (1.2kg) by QPS – Quality Plants & SeedlingsSlow Release NPK Fertiliser Complete Plant Nutrition 12 5 14 with Sulphur, Calcium, Magnesium & Micronutrients A complete slow release compound fertiliser designed to feed plants gradually through the soil. Ideal for seedlings, vegetables, fruit trees, ornamentals, turf, lawns, vines, pots and general garden use. Complete NPK Nutrition Slow Release Feeding For Gardens & Lawns 1. 2 kg Pack Simple Soil Feeding Spread, Water & Feed Apply sparingly around

Slow Release NPK Fertiliser

Complete Plant Nutrition 12-5-14 with Sulphur, Calcium, Magnesium & Micronutrients

A complete slow-release compound fertiliser designed to feed plants gradually through the soil. Ideal for seedlings, vegetables, fruit trees, ornamentals, turf, lawns, vines, pots and general garden use.

Complete NPK Nutrition Slow Release Feeding For Gardens & Lawns 1.2 kg Pack

Simple Soil Feeding

Spread, Water & Feed

Apply sparingly around the base of the plant and water as usual. Nutrients are released gradually as the fertiliser breaks down through regular watering.

The Long-Term Companion to ProBase+ Feeder

Slow Release NPK Fertiliser is ideal for ongoing background feeding through the soil.

Use this product when you want longer-lasting nutrition in pots, garden beds, fruit trees, turf and ornamentals. Use ProBase+ Feeder when you want a faster liquid feed that can be mixed with water and applied through a watering can or sprayer.

About Slow Release NPK Fertiliser

This complete compound fertiliser provides a balanced blend of nitrogen, phosphorus, potassium, sulphur, calcium, magnesium and key micronutrients to support healthy plant growth.

It is designed as a dry spread fertiliser that can be applied around plants, used as a top dressing, or incorporated into soil or growing media before planting.

Why Choose This Fertiliser?

  • Complete NPK compound fertiliser for broad garden use.
  • Feeds gradually through the soil when watered.
  • Suitable for seedlings, vegetables, fruit trees, ornamentals, turf and vines.
  • Contains nitrogen, phosphorus and potassium for balanced plant growth.
  • Includes sulphur, calcium, magnesium, zinc and boron.
  • Low salt index to help reduce the risk of fertiliser scorch when used correctly.
  • Non-dusting and free-flowing for easier application.
  • Can be used as a base fertiliser, top dressing, banded application or mixed into growing media.

How Much Should I Use?

Apply sparingly and avoid piling fertiliser directly against stems or trunks. Always water in well after application.

Garden Use Application Guide Best For
Indoor plants & small pots Apply a small amount around the outer edge of the pot and water in. Indoor plants, herbs, small decorative pots
Seedlings & young plants Use lightly around the root zone, keeping fertiliser away from direct stem contact. New seedlings, young vegetables, young herbs
Vegetable beds Apply as a light top dressing or incorporate into soil before planting. Vegetables, herbs and seasonal garden beds
Fruit trees & vines Spread evenly around the drip line and water in well. Fruit trees, vines and established edible plants
Lawns & turf Broadcast evenly and water in thoroughly after application. Turf, lawns and larger garden areas
Ornamentals Apply around the plant base or mix into surrounding soil before watering. Flowers, shrubs, ornamentals and garden beds
For small pots, seedlings or sensitive plants, start lightly. More is not always better with fertiliser.

Recommended Application Guide

Indoor Plants & Pots Apply sparingly around the base of the plant, keeping fertiliser away from direct stem contact. Water as usual.
Seedlings & Young Plants Use lightly around the root zone. Avoid direct contact with tender stems or exposed roots.
Vegetables, Herbs & Garden Beds Use as a light top dressing or mix into the soil before planting. Water in well after application.
Fruit Trees & Vines Spread around the drip line rather than against the trunk. Water in thoroughly.
Lawns & Turf Broadcast evenly and water in well. Avoid applying during extreme heat or to drought-stressed turf.
Ornamentals & Flowers Apply around the plant base and water in. Suitable for general garden maintenance and seasonal feeding.

How to Apply

1. Sprinkle

Apply sparingly around the base of the plant or evenly across the soil surface.

2. Keep Clear of Stems

Avoid piling fertiliser directly against plant stems, trunks or exposed roots.

3. Water In

Water thoroughly after application to begin nutrient release and help move nutrients into the soil.

4. Let It Work

The fertiliser releases gradually as it is watered and breaks down.

5. Reapply as Needed

Once the pellets have dissolved, reapply as needed depending on plant growth, season and garden conditions.

Ideal For Use On

  • Seedlings
  • Vegetables
  • Herbs
  • Fruit trees
  • Ornamentals
  • Turf and lawns
  • Vines
  • Potted plants
  • General garden plants

Quick Use Summary

Use Simple Guide
Indoor plants Apply sparingly around the pot and water in.
Young seedlings Use lightly and avoid direct stem contact.
Vegetables and herbs Top dress lightly or incorporate into soil before planting.
Pots and ornamentals Apply around the outer root zone and water in.
Fruit trees and vines Spread around the drip line and water in well.
Lawns and turf Broadcast evenly and water in thoroughly.

Guaranteed Analysis

Nutrient / Component Analysis
Nitrogen 12%
Phosphorus 5.0%
Potassium 14%
Sulphur 9.7%
Calcium 3.1%
Magnesium 1.2%
Zinc 0.1%
Boron 0.02%
Complete NPKS compound fertiliser with magnesium, calcium and micronutrients.

Nutrient Forms

Nitrogen Contains both nitrate and ammonium nitrogen for immediate response and longer-lasting feeding.
Potassium Potassium is supplied as sulphate of potash, making the product chloride-free.
Phosphorus Phosphorus is supplied in a soluble form to support root uptake, establishment and early development.
Secondary Nutrients & Micronutrients Includes calcium, sulphur, magnesium, zinc and boron to support broader plant nutrition.

Product Details

  • Product name: Slow Release NPK Fertiliser
  • Pack size: 1.2 kg
  • Analysis: 12-5-14 with sulphur, calcium, magnesium and micronutrients
  • Use: Complete slow-release plant nutrition
  • Application: Dry spread, top dressing, banded application or mixed into soil/growing media
  • Best for: Seedlings, vegetables, fruit trees, ornamentals, turf and vines

Important Information

Caution: For gardening use only. Keep out of reach of children and pets. Avoid contact with skin and eyes. Wash hands thoroughly after handling. If contact occurs, rinse thoroughly with water. If irritation persists, seek medical advice.

Store sealed in a cool, dry place away from direct sunlight and moisture.

Keep out of reach of children

Long-Lasting Nutrition for Healthier Plants

Slow Release NPK Fertiliser gives your garden complete balanced nutrition through the soil, helping support strong growth, healthy foliage and ongoing plant performance.

Add to Cart

Slow release Plant Fertiliser (1.2kg Rustica Plus)

The perfect complete NPK compound fertiliser for:

  • Seedlings
  • Vegetables
  • Fruit Trees
  • Ornamentals
  • Turf
  • Vines

RUSTICA PLUS by Campbells Fertilisers Australia

Slow-release NPKS compound fertiliser with Magnesium, Calcium and Micronutrients.

A dry spread application fertiliser that meets the complete nutritional requirements of vegetables, fruits, vines, flowers, turf and ornamentals. Rustica Plus has been widely used in Australian horticulture for over 40 years.

NUTRIENT FORMS:
Nitrogen is present both as nitrate and ammonium. The readily available nitrate-nitrogen gives an immediate growth response, while the more slowly available ammonium-nitrogen ensures a long-lasting effect.

Potassium is present as sulphate of potash only, which makes the product chloride-free.

Phosphorus is in a soluble form, allowing ready uptake by plant roots and is essential for the establishment and early development.

Secondary Nutrients and Micronutrients are present, with amounts tailored to plant production, with emphasis on calcium, sulphur, magnesium, zinc and boron.

ADVANTAGES:
The specific ratio of nutrients in Rustica Plus is formulated to meet the complete nutritional needs of a vast range of horticultural crops.

Rustica Plus has a low salt index and hence minimises the potential for fertiliser scorch. It is near neutral in its effect on soil pH, which helps maintain a productive soil environment.

Rustica Plus is a true compound fertiliser, not simply a mixture of different fertilisers pressed into a granular form (a granulated blend) or different fertilisers physically mixed together (a blended fertiliser).  The consistent granule size range allows uniform application with no separation of nutrients.

APPLICATION FOR INDOOR PLANTS:
Apply compound pallets sparingly around the base of the plant and water as usual. The fertiliser will be released when watered. Once pallets completely dissolve, re-apply as needed. See the website for more directions before opening.

GENERAL APPLICATION:
Campbells Rustica Plus is ideal as a base or top dressing.  It is a non-dusting, free-flowing product that can be applied as a band or broadcast or can be incorporated into the soil or growing medium prior to planting.


SPECIFICATIONS:

Analysis:
 12% Nitrogen, 5.0% Phosphorus, 14% Potassium, 9.7% Sulphur, 3.1% Calcium, 1.2% Magnesium, 0.1% Zinc and 0.02% Boron

Downloads: Safety Data Sheet or Visit Campbells Fertilisers

Shipping Notes
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Exchange/Return Notes
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SKU: 16615363376

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C
Celeste
Carnegie, US
★★★★★ 5
Perfect Sofa-Side Charging Hub
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
I picked this power strip mainly to use next to my sofa, where I usually charge my tablet, phone, and laptop while relaxing in the evening. Having 11 AC outlets and multiple USB ports in one place has made that corner much more organized, and I no longer have chargers scattered everywhere. The layout is well thought out. Larger plugs don't block neighboring outlets, and the flat angled plug fits nicely behind furniture. The 5-foot cord gives enough flexibility to position the strip where it's most convenient. I also like having both USB-A and USB-C ports available for smaller devices. For phones, tablets, earbuds, and similar electronics, the built-in USB ports have been very useful. For my everyday use, charging personal devices and powering small electronics, the unit has performed as expected. The overload protection switch and built-in safety features provide additional peace of mind. Overall, this has been a practical solution for adding more outlets to an older two-prong receptacle while keeping my charging area tidy and easy to access.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
A
Amazon Customer
New York, US
★★★★★ 1
Major Safety Red Flag! 3 Prong Outlets, 2 Prong Plug, This Does Not Provide A Grounded Connection!
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
This power strip has a compact design, a convenient outlet layout, and USB ports, so on the surface it looks useful. The patented three-row layout is clever for spacing the outlets, but that only applies to how the outlets are positioned. It does not change how the strip is actually powered or protected. The problem is the safety design. It has 11 three-prong outlets, but the wall plug itself is only two-prong. Without a ground prong, it is not grounded. The two flat prongs are hot and neutral only, so this does not provide the grounded protection that the three-prong outlets appear to suggest. That also makes the surge protection claims highly questionable to me. A real grounded surge protector should have a grounding path for excess surge energy. With only a two-prong plug, I would not trust this to provide the kind of surge protection people generally expect when plugging in electronics or grounded devices. The manual mentions surge protection, ground protection, short-circuit protection, over-current protection, over-voltage protection, over-heat protection, and UL 1363 safety standards, but I could not find any visible UL, ETL, or similar safety certification mark on the unit or paperwork. The only marking I saw was FCC, which is not the same thing as electrical safety certification. Given the two-prong plug and three-prong outlets, those protection claims feel dubious at best and misleading at worst. The USB charging is also underwhelming. The total USB output is listed as 24W, which is not much for today’s devices, especially when that power is shared across multiple ports. We frequently use 35W or higher from a single USB charger, so I would not buy this for fast or modern device charging either. Because of the two-prong plug paired with three-prong outlets, I will absolutely not use this. I do not want a power strip that makes devices appear protected or grounded when they are not. For me, this is not a small design issue. It is a serious safety concern.
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Reviewed in the United States on May 20, 2026
Y
Yuki WONG
Lowell, US
★★★★★ 3
Convenient Design but Raises Some Safety Concerns
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
As other reviews have mentioned, this power strip does not provide true grounding protection. It allows devices with three-prong plugs to connect through a two-prong wall outlet, but the strip itself still relies on a two-prong connection. Because of that, I think it’s important to understand the potential safety limitations before using it, especially with higher-powered electronics. It does offer a large number of outlets and USB ports, which is convenient for older homes with limited access to modern plugs. However, considering the price, there are safer and more reliable alternatives available that may be a better long-term choice.
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Reviewed in the United States on May 24, 2026
B
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Betsy N
Waukegan, US
★★★★★ 5
Good Buy - 4 USB Ports (USB C) Hurray! - Fits Well In Cable Management Box - Long Flat (!!!) Cord
Size: 10 Ft, Color: White
Good Product. I have 16 x 6 x 5 cable management boxes. This is the first power strip that I have found with 4 USB ports with USB C. Because it is a single row of outlets, the power supplies for 2 laptops fit in the box. I have those, a lamp, phone, and iPAD, with 1 extra USB and 1 USB C cord plugged in. The low profile inside the larger ventilated box keeps things from overheating. It has taken a bit of adjusting to get everybody in the right place but it works great. The flat cable is smart. It fits under the corner of the rug without leaving a bump.
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Reviewed in the United States on October 15, 2023
D
Verified Purchase
David Srein
Fort Morgan, US
★★★★★ 5
Great for Any Inside Area
Size: 10 Ft, Color: White
I bought two of these these for my office at work and the power is unstable and there are not many outlets (work for the schools) and the building is old - built in 1977. These have done the trick and I have had no issues with my electronics.
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Reviewed in the United States on April 21, 2026

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