1.5" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes

1.5" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes

$41.99
Sale price  $41.99 Regular price  $69.99
Skip to product information
1.5" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes

1.5" Grodan Rockwool Cubes for Seed Starter (98 Hydroponic Plugs) + The Hydroponic City Stakes

$41.99
Sale price  $41.99 Regular price  $69.99
FREE shipping on orders $50+· add $8.01 moreShips from West Long Branch, NJ. Typically arrives in 3–7 business days.
30-day returnsChanged your mind? Send it back within 30 days. Return policy
Secure checkoutQuestions? Call 1-888-460-3822 · Mon–Fri 9–5 ET

Key features

  • Ideal for Hydroponics and Soilless Growing - Rockwool cubes provide excellent water retention and air flow, making them perfect for hydroponic systems, aeroponics, and other soilless grow methods.
  • Promotes Strong Root Development - Engineered for optimal root aeration, Grodan cubes encourage rapid and healthy root formation—ideal for seeds, clones, and cuttings.
  • Easy to Use for Propagation - Simply wet, insert seeds or cuttings, and place in a tray or grow system. Grodan cubes maintain structure and moisture without mess or soil.
  • Great for Seed Starting and Cloning- Perfectly sized for germination trays and humidity domes. Great for vegetables, herbs, flowers, and cannabis cultivation.
  • Sterile and pH Neutral Growing Medium - Made from spun basalt rock, Grodan rockwool is an inert and sterile substrate with a balanced pH—ideal for supporting healthy root development from seed to transplant.

Free shipping included. 30-day hassle-free returns.