VIVOSUN 1" Rockwool Starter Cubes 200 Pack — Sterile Stonewool Plugs with Pre-Formed Seed Hole

VIVOSUN 1" Rockwool Cubes are sterile stonewool starter plugs sold as 200 compact 1-inch cubes designed for seed starting, cloning and hydroponic propagation.

These VIVOSUN rockwool cubes are made from spun volcanic rock fibers and compressed into uniform 1-inch plugs that simplify germination and root development. The pack contains four sheets of 50 cubes (200 total) that are pre-formed with a center hole for seeds or cuttings. Because they’re inorganic and sterile, they provide a neutral, contaminant-free environment you can move into different growing systems with minimal transplant shock.

How do these rockwool cubes help seedlings and cuttings establish roots?

The high porosity and fiber structure let roots access oxygen while retaining moisture, which supports steady root formation without waterlogging. The built-in seed hole centers the plant for consistent root direction and easier monitoring.

• 95% porosity for balanced air-to-water ratio
• Pre-formed hole for precise seed/cutting placement
• Light, fluffy texture that promotes rapid root penetration

What makes VIVOSUN rockwool suitable for hydroponic systems?

Because these cubes are inorganic and sterile, they won’t introduce soil-borne pathogens or organic debris to recirculating systems. Their consistent size and drainage behavior make them easy to use in trays, net pots, or raft systems.

• Uniform 1" size fits standard propagation trays and net pots
• Excellent drainage reduces standing water in hydro systems
• Transferable to other media once roots are established

Are these rockwool cubes easy to handle and customize?

The sheets are lightweight and can be cut or split to fit different containers or to create smaller plugs for specific crops. Each cube is soft enough to inspect roots visually and robust enough to remain intact during transplanting.

• Can be trimmed to custom shapes and sizes
• Clear root observation for timely transplanting decisions
• Durable compression prevents collapse when moved

How do I use and care for these rockwool starter plugs?

Pre-soak cubes with pH-adjusted water (if needed) before placing seeds or cuttings to ensure even moisture. Keep them in a warm, humid environment with adequate light for fast germination, and transplant once roots have grown through the cube.

• Soak briefly to reach optimal moisture before planting
• Use gentle nutrient regimes when roots first appear
• Transplant to hydro or soil once the root mass is established

Who is this for: Growers who want reliable, sterile starter plugs for hydroponics, propagation, or greenhouse seeding will appreciate VIVOSUN 1" Rockwool Cubes. They suit hobby gardeners, commercial propagators, and anyone cloning plants or starting seeds indoors who needs uniform, easy-to-handle plugs that promote healthy root development without introducing soil-borne variables.