Grodan® Gro-Block® Improved GR32 Hugo with Hole, 6" x 6" x 6" (64/case)

Give full-cycle crops a uniform 6-inch stone wool root zone with improved wetting and water distribution. This Grodan GR32 Hugo Gro-Block case includes 64 wrapped blocks, each with a planting hole sized for a 1.5-inch A-OK starter plug or Macro plug.

Why growers choose the Improved Hugo block

• Large growing volume: Suitable for growing most vegetables and some fruiting plants through the crop cycle.
• Advanced wetting technology: Supports more even water and nutrient distribution through the block.
• Better root-zone control: Helps growers monitor and manage water content and EC throughout the substrate.
• Improved re-wettability: Designed to make it easier to restore water concentration in the substrate.
• Wrapped blocks: These blocks include the plastic covering shown for wrapped versions.

Product details

• Block size: 6 x 6 x 6 inches
• Media: Improved stone wool
• Quantity: Case of 64
• Version: Wrapped
• Planting hole: Fits 1.5-inch A-OK starter plugs or Macro plugs

Basic use

1. Saturate in a nutrient solution around 1.5 EC and 5.5 pH with a coarse spray or by submerging for up to 2 minutes. Do not leave the blocks soaking.
2. Record the wet weight at saturation and track block weight during the cycle.
3. Insert a well-rooted starter plug into the hole.
4. Use pressure-compensated drip irrigation. Grodan recommends two drip stakes per White Jumbo or White Hugo block.
5. Suggested irrigation volume is 3–6% of growing-media volume. For a White Hugo example, that is approximately 100–200 mL.

Use your crop program and measured root-zone conditions to fine-tune irrigation and steering.