Quick Answer

Compressed coco coir blocks that expand instantly with water, acting as both container and medium.
Biodegradable and mesh-reinforced, forming a stable, high-oxygen root environment.
Available in 50mm Square, 50mm Round and 80mm Square to match your propagation stage specifically.
Ships fast from within Australia.

100% Coco Coir Propagation Blocks for Cloning, Seedlings and Indoor Plant Growth

Jiffy Grow Blocks are a professional coco coir propagation system that functions as both container and growing medium in one. Compressed, biodegradable, and mesh-reinforced, they activate instantly with water and a nutrient solution, expanding into a stable, high-oxygen root environment that's ready for cuttings or seeds immediately.

Available in three formats to match your propagation stage: 50mm Square for standard cloning and seedling work, 50mm Round for improved root symmetry and radial development, and 80mm Square for extended propagation cycles and transplant-ready root systems.

Why Jiffy Coco Blocks Outperform Loose Coco and Rockwool Alternatives

100% Coco Coir Substrate. Renewable, pH-stable, and naturally high in air-to-water ratio. Compatible with all hydroponic nutrient programs and significantly more forgiving than rockwool for growers new to propagation media.
Container and Medium in One. No separate pots, no transplant shock from medium transfer. The block goes directly from propagation tray to final system, roots and all.
Biodegradable Mesh Reinforcement. Holds block structure through the full rooting period while allowing roots to penetrate and exit freely. Transplant the entire block without disturbing the root system.
Expandable Dry Block Technology. Ships and stores compressed. Activates with water in minutes. No pre-soaking period required beyond initial hydration.
High Air-to-Water Ratio. Coco coir fibre structure maintains oxygen availability at the root zone, preventing the anaerobic conditions that cause cutting failure and damping-off.
Multiple Format Options. 50mm square for batch cloning, 50mm round for uniform radial root development, 80mm square for larger cuttings and longer propagation cycles before transplant.

Available Formats

50mm Square, standard propagation cube for cloning and seedlings. Fits most propagation trays.
50mm Round, promotes uniform radial root development. Ideal for cuttings where root symmetry matters at transplant.
80mm Square, extended root volume for larger cuttings, longer propagation cycles, and transplant-ready root systems.

How to Use Jiffy Coco Grow Blocks

Hydrate blocks in pH 5.8-6.2 water with a dilute nutrient solution until fully expanded. Add Clonex Rooting Gel to cuttings before insertion for maximum rooting success.
Cuttings: Insert treated cutting into the centre of the expanded block. Place under a humidity dome immediately.
Seeds: Place one seed per block at 5-10mm depth. Maintain 22-26°C and high humidity until germination.
Transplanting: Move when roots are visible at the base and sides of the block. Transplant the entire block directly into your growing system or medium.

Frequently Bought Together

Clonex Rooting Hormone Gel. Apply to cuttings before inserting into Jiffy blocks for faster, more reliable root initiation.
JB's Propagation Lid. Self-dripping humidity dome that maintains the high-humidity environment coco coir blocks and fresh cuttings need during the rooting period.
HOMEbox R80S Propagation Tent. Dedicated propagation environment for full climate control over temperature and humidity during cloning and germination.
Grodan 40mm Rockwool Cubes. Prefer a rockwool-based propagation medium? The Grodan 40mm cube is the commercial-standard alternative to coco blocks for hydroponic cloning.

Product Details

Type: Coco Coir Propagation Block
Material: 100% coconut coir
Available Sizes: 50mm Square, 50mm Round, 80mm Square
Structure: Biodegradable mesh-reinforced compressed block
pH Range: Neutral buffered coco, compatible with pH 5.8-6.2 hydroponic programs
Application: Cloning, seed germination, indoor plant propagation
Compatible Systems: Hydroponics, coco, soil, indoor plants, terrariums
Vendor: Jiffy

Frequently Asked Questions

Do I need to prepare Jiffy Coco Grow Blocks 50mm & 80mm before using it?

Coco coir products including Jiffy Coco Grow Blocks 50mm & 80mm should be pre-buffered with a calcium-magnesium solution before use to prevent cation exchange issues that cause nutrient lockout. Expanded clay pebbles (LECA) should be thoroughly rinsed and soaked in pH-adjusted water before planting to remove dust and stabilise pH. Rockwool should be pre-soaked in pH 5.5 water for 24 hours before use to lower its naturally alkaline pH.

Can I reuse Jiffy Coco Grow Blocks 50mm & 80mm?

Inert media such as expanded clay pebbles can be sterilised and reused multiple times. Rinse thoroughly, soak in a 10% bleach or hydrogen peroxide solution, rinse again with clean water, and re-buffer before reuse. Coco coir can be reused for 2 to 3 grows if properly maintained and sterilised between cycles. Rockwool is typically single-use in commercial applications but can be reused in home setups with thorough cleaning.

What nutrient solution pH should I use with Jiffy Coco Grow Blocks 50mm & 80mm?

Target pH 5.8 to 6.2 for coco and hydro inert media. Soil users should target 6.0 to 6.5. Maintaining pH within the optimal range ensures all macro and micronutrients remain soluble and available to plant roots. Use a calibrated pH pen and adjust with pH Up or pH Down solution as needed after mixing your nutrient solution.

Does Jiffy Coco Grow Blocks 50mm & 80mm ship fast within Australia?

Yes, Jiffy Coco Grow Blocks 50mm & 80mm ships from within Australia with fast tracked delivery Australia-wide. Most orders to VIC, NSW, QLD, SA and ACT arrive within 2 to 5 business days. WA, NT, and TAS orders typically arrive within 5 to 12 business days.