Improve lawn and soil health with the N-Ext Bio-Stimulant Pack, a four-gallon lawn care kit that supports root development, nutrient availability, micronutrient levels, water penetration, and deeper turf rooting. This starter pack includes one gallon each of RGS, Humic-12, MicroGreene, and Air-8—four complementary liquid products for cool-season and warm-season lawns.
The N-Ext Bio-Stimulant Pack includes four 1-gallon bottles:
Bio-stimulants support the biological and physical conditions that help turfgrass use available nutrients more effectively. The products in this pack are designed to complement one another by supporting root growth, soil health, micronutrient availability, and water movement through the soil.
RGS uses sea kelp and humic acid to support root development and the growth of stolons and rhizomes. Humic-12 helps improve overall soil health and nutrient availability. MicroGreene provides micronutrients and is especially useful when a soil test identifies micronutrient deficiencies. Air-8 is a liquid aeration product designed to improve water penetration and encourage deeper roots by helping create space in the topsoil profile.
The N-Ext Bio-Stimulant Pack can be used on labeled cool-season and warm-season grasses, including:
Coverage is based on the lowest application rate. Always use the application rate and coverage information listed on the current product label.
For individual product application rates, mixing instructions, and hose-end sprayer use, refer to the product labels and application resources. Custom application timing and recommendations are also available through the free Yard Mastery app Legacy Program.
What is the Yard Mastery Bio-Stimulant Pack?
The Yard Mastery Bio-Stimulant Pack is a four-gallon soil and lawn improvement bundle containing one gallon each of RGS, Humic12, Air-8, and MicroGreene. Together, these products are designed to support root development, improve soil health, increase water penetration, and help turf make better use of available nutrients.
What does each product in the Bio-Stimulant Pack do?
RGS (Root Growth Stimulant) uses sea kelp and humic acid to support roots, stolons, and rhizomes while helping turf handle heat and drought stress. Humic12 contains a high concentration of humic acid to help make nutrients more available to plant roots. Air-8 is a liquid aeration product designed to create space in compacted soil for air, water, and nutrients. MicroGreene supplies micronutrients, potassium, iron, humic acid, and sea kelp to support turf color and growth.
How do you apply the Yard Mastery Bio-Stimulant Pack?
Apply the products according to their individual product labels using a pump sprayer, backpack sprayer, or hose-end sprayer. Each product can be applied during the growing season, and the pack is suitable for many cool-season and warm-season grasses. For personalized application timing and recommendations, use the free Yard Mastery app.
Does the Bio-Stimulant Pack need to be watered in?
Yes. When applying the products with a pump or backpack sprayer, water them into the soil within 24 hours using approximately ¼ inch of rainfall or irrigation. A hose-end sprayer application can count as watering in, although additional irrigation is still helpful. Do not apply more than the label recommends, and follow the instructions for each product.
| Shipping |
Shipping calculated at checkout No P.O. Boxes Not available in Oregon, California, Alaska or Hawaii |
| Delivery Time | 4–7 business days |
| Returns | All sales are final; no cancellations, returns, or exchanges. |
| Customer Support | Contact Yard Mastery Support |
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