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Frass Fertilizer
Frass Fertilizer
Frass Fertilizer
Frass Fertilizer
Frass Fertilizer
Frass Fertilizer

Frass Fertilizer

$16.00

After years of evaluating fertilizers, we've finally found another one we feel good about adding to our lineup- Frass by Grubetts! 

Created as part of a closed-loop system, right here in southern California, frass is an up-cycled product of Black Solider Fly larvae- similar to worm castings. By diverting it from landfills and putting those flies to work, Frass by Grubetts transforms FDA approved pre-consumer food waste (which accounts for 40% of all food waste in the US) into fertilizer that not only feeds your plants, but creates healthy soil too. Frass contains chitin and beneficial biology which are known to assist in nutrient cycling, aid in nutrient uptake, reduce nutrient leaching, stimulate natural immune responses in plants, prevent predator insects and pests from harming plants, and promote resistance against soil pests and parasitic nematodes.

Use this dry, granular fertilizer to prep your soil when potting, as a top-dressing to encourage growth, or make frass 'tea' with it to use as a root drench or foliar spray. Can also be used in outdoor gardening, and as a compost starter. The 3-2-2 NPK formula is perfect for growing lush foliage, and the non-water soluble nitrogen releases slowly over 3-4 weeks. 

See last two images above for our recommended usage instructions for potting and top-dressing developed specifically with houseplants in mind. Packaging contains instructions for other applications as well. 

  • Produced in southern California from local food waste diverted from landfills
  • Packed in commercially compostable packaging
  • 3-2-2 NPK formula
  • 2 lb package (~10 cups or 164 Tbsp, so enough to top dress 13 4" plants once a month for a year)
  • Certified Organic and CDFA certified