Best Fertilizer For Outdoor Grow

Trying to find the best fertilizer for outdoor grow? In this outdoor grow guide yield sheet, we're covering the rates of fertilizer you'll need from plant to harvest in your outdoor grow.

Outdoor Grow Guide Yield

One of the most important things to keep in mind when planning to find the fertilizer for outdoor grow yields is, is it organic?

We’re organic farmers that specialize in organically approved crop inputs. We’ve been farming organically ourselves since the early 2000s, and we’ve got a certified agronomist on staff here at Crop Fertility Services. We’re proud to work with Purple Cow Organics and our team of farmers across North America. 

For Bulk Grow Fertilizer Orders, contact Ron at CFS. He’s available via call or text, (612)309-7522.

For orders less than 1 ton, we recommend ordering online at Amazon.

OMRI Approved Outdoor Grow Fertilizer

Purple Cow Indicanja is a partnership between a Michigan Grower and the organic fertilizer team at Purple Cow Organics. We’ve partnered with Purple Cow on our own organic farms and have found dramatic yield increases across the board.

This fertilizer is designed to produce nutrient dense plants, increase your yield, and deliver a product that’s as clean as possible, every time.

Is it fine to use an all in one fertilizer for outdoor grow?

Many growers will tell you, and they’re not completely wrong, that you should be careful of “all in one” fertilizers.

With that being said, the offering from Purple Cow is the closest we’ve found. From our Colorado Farmers, to Michigan, we’ve been finding yield increases throughout the growing cycle that were not possible previously. This fertilizer product was developed specifically for use in a large outdoor

Is this an organic grow fertilizer?

Yes. This product is OMRI listed, the certification is linked here.


  • Purple Cow Compost
  • Sphagnum Peat Moss
  • Perlite
  • Bone Meal
  • Kelp Meal
  • Potash
  • Poultry Litter
  • Volcanic Ash

Product Spec Sheet

  • Nutrient dense material for home gardeners and hobby and commercial farms
  • Supports the goal of cultivating “cleanly” grown flowers and extracted compounds for human consumption, whether inhaled or ingested
  • It’s easy! Organic and “ready-to-use” requiring no further work
  • Contains essential nutrients and organic matter that may naturally increase water uptake
  • Developed by a grower for growers


Buy on Amazon, or for Bulk Quotes Contact CFS Ron: (612)309-7522


NutrientsPercentage (As Rec’d)Percentage (Dry Weight)
% Organic Matter26.83%52.00%
Total Nitrogen0.88%1.70%
C / N Ratio17:117:1

Get A Bulk Quote

Get A No Hassle Quote

Get a quick, no-hassle quote on anything delivered to your farm. We pride ourselves on an unmatched level of service from start to finish and deliver anywhere in the United States. Try us, I dare you.

Get a Quote

The Minimum Pellet order is 25 Tons (one semi-load) – Fill this out, we’ll be in touch!