Rockwool planting cubes for seed germination
Affordable · Hydroponic plant food · Propagation and cloning kits · Rockwool grow cubes
Hydroponics
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CastleGreens
CastleGreens Hydroponics
These listings offer propagation supplies for growers starting plants from seeds or cuttings. Use these rockwool cubes and nutrients to support early root development
Top pick
Listings
1 system from CastleGreens
Why this brand
Seed germination support
Start new plants with 1 in rockwool cubes.
Cloning and cuttings
Use these kits for successful plant propagation.
Bulk cube sheets
Get 200 cubes across four separate sheets.
First-hand
From this set
These 1 in cubes are great for starting my tomato seeds.
I used the rockwool for cloning and the roots appeared quickly.
The four sheets provide plenty of space for all my cuttings.
Why it’s listed
Propagation and Rooting
These 1 in rockwool cubes provide a stable medium for seed germination and cloning. The material supports moisture retention for rooting cuttings.
- 1 in rockwool cubes
- 200 total cubes
- Four sheet sets
- Propagation kits
- Hydroponic plant food
Inside the range
Rooting and Cloning
These cubes are made specifically for starting cuttings and seeds.
Large Scale Growing
With 200 cubes available, you can start many plants at once.
Nutrient Support
This catalog includes plant food to help young starts grow.
Standard Sizing
The 1 in cubes fit most standard hydroponic trays.
Quick answers
CastleGreens Questions
How many cubes are in a set?
This set includes 200 cubes total across four sheets.
What size are the cubes?
Each rockwool cube measures 1 in.
What are these used for?
They are used for seed germination, rooting, and cloning plants.
Does the brand offer fertilizer?
Yes, these listings include hydroponic plant food and nutrients.