Fearless Gardener Brand - Rock Hard

For use in nutrient solution: Implement Rock Hard up to 3 weeks before flush. Add 0.1g per 1L or 0.4g per gallon for the first week, 0.2g per 1L or 0.8g per gallon for the second week, and 0.5g per 1L or 2g per gallon for the last week before flush.

Instruction for use on its own: Mix 1g per 1L or 4g per gallon.


Rock Hard increases the EC/ppm greatly, so use with caution and remember - less is more! *** Do not foliar spray ***

** For detailed feed schedule click the downloads tab.

Caution: Avoid contact with eyes, open cuts, or sores. Keep out of reach of children and pets. For general clean-up, use a detergent or Resin Off.

Feed Schedule - One Part - Soil / Coco /Outdoor

Feed Schedule - Deep Water Culture

Feed Schedule - Drain To Waste