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Fertilizer blackout periods

Keep Turf Growing During Fertilizer Blackouts

Continue to grow great turf, improve soil fertility, and impress your customers during blackout periods with environmentally responsible Mirimichi Green products.

What Is a Fertilizer Blackout?

Runoff from excessive nutrient applications can cause toxic algae blooms that harm aquatic ecosystems and the people who rely on them. States and municipalities respond with fertilizer application restriction periods, known as blackout dates.

During a blackout, homeowners and professional applicators are restricted in their use of fertilizers containing nitrogen and/or phosphorus. Rules vary, so check with your local extension agent if you are unsure what applies to you.

What Can I Use During a Blackout?

We recommend four core products when you need to grow turf during a fertilizer blackout. Each supports healthy soil and makes the nutrients already there more available to plants.

CarbonizPN Soil Enhancer
Non-Granular CarbonizPN Soil Enhancer

Our original bulk soil amendment. Best applied with a motorized spreader under new sod, or topdressed over an existing lawn.

$59.00
Sizes
40 lb bag, super sack
Rate
Spread 20-40 lbs. per 1,000 SF.
CarbonizPN-G Granular Soil Enhancer
Granular CarbonizPN-G Granular Soil Enhancer

Professional-grade spreadable granular amendment for maintaining turf, establishing sod or seed, and nursery or ornamental planting.

$61.99
Sizes
40 lb bag, super sack
Rate
Spread 20-40 lbs. (½-1 bag) per 1,000 SF.
Release Zero™
Liquid Release Zero™

Organic liquid soil amendment, sprayed on leaves or drenched into soil. Delivers nano-sized micronutrients with zero N-P-K.

From $53.00
Sizes
32 oz jug, 1 gal jug, 2.5 gal jug
Rate
Spray 2-7 ounces per 1,000 SF
ByoSpxtrum™
Water Activated Powder ByoSpxtrum™

Water-soluble microbes, microbial food, and enzymes that make nutrients already in the soil available to plants, with no synthetic fertilizer.

From $85.00
Sizes
17 oz
Rate
3.4 to 6.8 oz per acre (2.2 to 4.4 grams per 1,000…

Which Products Should I Choose?

Use these products on their own or mix and match to fit your equipment and program. For example, pair Release Zero, for essential micronutrients, with a carbon-building soil amendment that grows beneficial soil biology and "mines" the N-P-K already in the soil profile.

Mining N-P-K this way unlocks nutrients that were present but unavailable to plants, without an additional application or risk of runoff.

Florida Fertilizer Blackout Dates

As of this writing, 32 Florida counties have, or contain municipalities with, fertilizer restrictions. Thanks to the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) for compiling this information. Last updated 06/06/2019.

Where to Buy Mirimichi Green

Our products are stocked by the nation's top professional landscape supply companies at 1,414+ branches, and online.