The issues USGA agronomists report from the field, region by region, and how the Sigma Foundation Program fits each one. Granular at the right events, liquids in the tank you already spray.
Ultradwarf and bermudagrass greens can lose root depth fast under heat, heavy rain and low mowing heights. Shallow roots mean more hand-watering, slower recovery and thinner turf going into fall.
The Sigma Foundation approach
Granular foundation at aerification: Sigma 4-4-4 Bio at 12.5 lb / 1,000 ft² worked into open cores, putting organic N, humic acids and the microbial package right where new roots grow.
Liquid Foundation in the tank you already spray: Sigma Bio, Molasses, Microalgae, Biochar 5m, Seaweed and K-Ferm at weekly rates times the weeks between sprays.
Rides with the existing fungicide program as a companion. It doesn't replace any pesticide on the label schedule.
El Niño winters bring more rain, more cloud cover and cooler soils across the Southeast. Bermudagrass stays dormant longer, overseeded turf stays wet, and spring green-up can be uneven.
The Sigma Foundation approach
Keep biology fed while the turf is slow: low liquid rates with each winter spray instead of pushing nitrogen into cold soils.
Plan the granular step for spring green-up and the first aerification, when soils warm and roots can use it.
Full details are in the Southeast Super El Niño guide.
Sandy Southeast rootzones change quickly through the year, and irrigation water quality affects both the turf and spray-tank performance. One spring soil test isn't enough to steer a program.
The Sigma Foundation approach
Our agronomy team builds rates from your soil and water tests. Share them on the request form and the program is adjusted to them.
Granular rates follow the pounds of product per pound of nitrogen tables on every Sigma data sheet.
Check tank mix order and pH with the Liquid tank mixing instructions.
Ice cover, crown hydration and desiccation can kill annual bluegrass and thin bentgrass. Recovery depends on getting seed or plugs established quickly once soils warm.
The Sigma Foundation approach
At reseeding and spring aerification: Sigma 4-4-4 Bio at the medium rate into the cores and seedbed.
Liquid Foundation with spring sprays to rebuild biology in damaged areas while new seedlings root.
The Establishment overseed schedule covers interseeding into thin turf.
Organic matter builds in the top inch of greens and fairways faster than most programs remove it. Layers hold water, restrict air and keep roots shallow.
The Sigma Foundation approach
Pair the program with core aerification and sand topdressing, which do the physical work of managing organic matter.
Apply granular into open holes and with topdressing every 30–45 days at the low rate (6.9 lb / 1,000 ft²), so biology and humic acids move into the profile, not on top of it.
Track progress with standardized organic matter testing.
Standardized organic matter testing lets a superintendent compare greens and years and set aerification and topdressing targets from numbers instead of feel.
The Sigma Foundation approach
Use the test results to set aerification and topdressing frequency. The Sigma granular steps follow those same events.
Share recent organic matter results on the request form and our team will match the program to them.
Drought and irrigation restrictions force hard choices about where to water. Rootzones that hold water evenly and turf with deeper roots ride out dry periods better.
The Sigma Foundation approach
Sigma Biochar 5m, a 5-micron biochar suspension, adds surface area and water-holding capacity to the rootzone and sprays with standard equipment.
Seaweed and Microalgae in the Liquid Foundation supply carbon food sources for the soil biology through stress periods.
Rates per spray are on the Liquid Foundation products catalog.
Much of the West irrigates with water high in bicarbonates, sodium or salts, and regulations keep tightening supply. Water quality shapes soil chemistry as much as fertilizer does.
The Sigma Foundation approach
Run the Foundation Program alongside your water treatment plan (acid injection, gypsum, leaching), not instead of it.
Liquid Foundation adds organic acids, carbon and biology to the rootzone with each spray. K-Ferm supplies complexed potassium.
Send your irrigation water test with the request form so rates and products fit your water.
Hydrophobic sand in summer greens and tees resists rewetting, so patches dry out even with irrigation on schedule. Wetting agents and hand-watering are the first line.
The Sigma Foundation approach
Sigma Biochar 5m is hydrophilic and stays in suspension, so it can ride in the tank with your wetting agent program.
Keep the Liquid Foundation in summer sprays to support root depth in the problem areas.
Topics and titles are from the USGA Green Section Record regional updates (archive at the MSU Turfgrass Information Center). Summaries are Sigma's own. Sigma products are fertilizers and soil amendments used as companions to your existing program; they are not pesticides. Always read and follow the product label.
