Grodan Improved Gro-Block Big Mama, 8 x 8 x 8, no hole, case of 18 chillers-heaters-and-purification • Low phosphorous fertilizer included

• Low phosphorous fertilizer included to better support mycorrhizae establishment and growth

• REI: 4 Hrs• Active Ingredient: Phosphorus acid and Hydrogen Peroxide• Rate: 42oz per 100gal• Controls: Pythium

1000W DE CMH LAMPS SOLD SEPARATELY(available in 3K & 4K color temperatures)

Can be used up to the day of harvest - 0-day PHI (Pre-Harvest Interval)

the light stays cool and very quiet

Grodan Improved Gro-Block Big Mama, 8 x 8 x 8, no hole, case of 18 chillers-heaters-and-purification • Low phosphorous fertilizer includedGrodan Improved Gro BlocksLeverage the benefits of products developed alongside plant scientists, that are specifically engineered to deliver real results for your crops. Grodan Gro Blocks Improved with Advanced Wetting Technology Grodan's improved stone wool substrate. Keep it RealReal ScienceGrodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone