Compost Activator 4.5-0-0 – Fast Acting Nitrogen Booster for Compost Heaps & Bins

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Compost Activator.

Compost Activator

Regular price £6.99 £0.00
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Magic Garden Compost Activator 4.5-0-0 is a fast-acting nitrogen-rich compost booster supplied by HD Chemicals. Designed to accelerate the natural breakdown of organic waste, it helps generate heat, encourages microbial activity, and produces rich, nutrient-dense compost faster. Ideal for compost bins, heaps, and garden waste systems.


Key Features

  • ✔ Nitrogen-rich formula (4.5-0-0) to speed up composting

  • ✔ Encourages microbial activity and heat generation

  • ✔ Improves final compost quality and nutrient value

  • ✔ Easy to apply and fast acting

  • ✔ Supplied in secure grip seal bags


Uses

  • Garden compost bins

  • Open compost heaps

  • Food and green waste composting

  • Leaf litter and grass clippings

  • Organic garden waste recycling


📋 Product Details

  • Weight: 500g (1 grip seal bag) | 1–4kg (multipack of 1kg grip seal bags)

  • Grade: Horticultural Grade

  • Form: Powder / Granular


📈 Other Names

Compost Activator Powder, Compost Accelerator, Nitrogen Compost Booster, Fast Compost Starter, Garden Compost Enhancer, Organic Waste Decomposer


🌱 How to Use – Step by Step (Main Uses)

1️⃣ Compost Bins

  1. Estimate the surface area of compost material

  2. Apply 135g per m² evenly over the compost

  3. Mix lightly into the top layer

  4. Keep compost moist but not waterlogged

2️⃣ Open Compost Heaps

  1. Measure compost volume and estimate square metres covered

  2. Multiply total m² by 135g to calculate required amount

  3. Sprinkle evenly between layers

  4. Turn heap after application

3️⃣ Grass Clippings & Green Waste

  1. Apply 135g per m² of material

  2. Mix thoroughly

  3. Add water if dry

4️⃣ Food Waste Composting

  1. Add waste in layers

  2. Sprinkle compost activator evenly

  3. Cover with brown material (leaves, cardboard)

5️⃣ Reviving Slow Compost

  1. Apply 135g per m²

  2. Turn compost to aerate

  3. Maintain moisture levels

📏 Dosage Calculation Method:

  • Estimate the square metres the compost volume would cover

  • Multiply the area by 135g

  • Result = total grams required for application

Safety & Storage

  • Wear gloves when handling

  • Avoid inhaling dust

  • Keep away from children and pets

  • Store in a cool, dry place


Frequently Asked Questions (FAQ)

1️⃣ How long does it take to speed up composting?
Heat and activity usually increase within 7–10 days.

2️⃣ Can I use it in closed compost bins?
Yes, it is suitable for both closed bins and open heaps.

3️⃣ Is this product a fertiliser?
It is designed to activate compost, not for direct plant feeding.

4️⃣ How often should I apply it?
Apply when adding large amounts of waste or if compost slows down.

5️⃣ How is the product packaged?
All Magic Garden products are supplied in grip seal bags:

  • 500g = 1 bag

  • 1–4kg = multipack of 1kg bags

Buyer assumes all responsibility for safety and use not in accordance with directions.

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