Mycorrhizae, Humic Acid & Seaweed: The Biological Trinity
Under Sod 4-2-5 is blended into the top 4 to 6 inches of soil before the sod goes down. The label method is incorporation. If you cannot mix it in, use the quarter-rate topical application.
The rate is one 25-pound bag per pallet of sod (500 square feet), which is 50 pounds per 1,000 square feet, blended into the top 4 to 6 inches of soil.
The whole is greater than the sum of its parts.
Each of these three inputs is valuable on its own. The reason Under Sod 4-2-5 combines all three is that they reinforce one another — a synergy conventional starters never attempt.
The Three Players
- Mycorrhizal fungi extend the root system and deliver water and phosphorus from beyond the root zone.
- Humic acid builds the soil chemistry and habitat the fungi need to colonize and thrive.
- Seaweed extract supplies natural cytokinins and auxins that reduce transplant shock and trigger new root growth.
Why They Work Better Together
Seaweed kick-starts root initiation in the first days. Humic acid prepares the soil so the fungi can establish. The fungi then extend that new root system far and wide. Each input sets the stage for the next — which is why the combination outperforms any single amendment.
The biological trinity
Initiate roots, build the soil, extend the network — in that order, working as one.
Step two
Day 30: OVER SOD™ 8-0-6 is step two, a phosphorus-free surface feed with mostly slow-release nitrogen, at one 25-pound bag per four pallets of sod (2,000 square feet), which is 12.5 pounds per 1,000 square feet: about 1 pound of nitrogen, 0.75 pound of potash, and no phosphate. Water it in. If day 30 falls inside your state's fertilizer blackout, wait for the first allowed date. OVER SOD™ ships spring 2027. About Over Sod 8-0-6
