New Arrival
Online Only
Power Si 5 lb. (2.27kg) Power Start Dry Plant Supplement with Mycorrhizae and Nitrogen-Fixing Bacteria, 1 pk.
Item # 604262299
Neighbor’s Club Members earn points with purchases.
New Arrival
Online Only
Power Si 5 lb. (2.27kg) Power Start Dry Plant Supplement with Mycorrhizae and Nitrogen-Fixing Bacteria, 1 pk.
Item # 604262299
This item is available online only
Delivering to
37027
Neighbor’s Club Members earn points with purchases.
Power Si Start 5lb is a high-performance, all-natural microbial root booster formulated for growers who demand reliable results on a larger scale. With four concentrated endomycorrhizae species and powerful nitrogen-fixing bacteria, it supercharges root development, improves nutrient uptake, and helps plants bounce back faster after transplanting. Designed for nurseries, greenhouses, and larger outdoor or indoor grows, Power Si Start improves early-stage plant strength and builds a healthy soil ecosystem. Its microbes work together to convert nitrogen into a plant-available form, ensuring better nutrient efficiency and promoting vigorous vegetative growth. Whether you're transplanting thousands of seedlings or fortifying soil across beds and containers, Power Si Start 5lb offers unmatched value and performance.
Looking for more information on fertilizer? Check out our guide on how to read fertilizer numbers in the product documents section.
- 5lb Size for Large-Scale Growing Ideal for commercial growers, nurseries, and serious gardeners who need long-term performance across many plants.
- Accelerates Root Development Promotes strong, early root growth for better nutrient and water uptake right from the start.
- Rich in Beneficial Microbes Contains 4 highly concentrated species of endomycorrhizae and nitrogen-fixing bacteria to improve soil health and plant vitality.
- Reduces Transplant Shock Helps plants recover quickly from transplanting and adapt better to new environments.
- All-Natural & Versatile Safe for all plants, growing media, and compatible with any fertilizer program. Clean, organic formulation with no synthetic additives.
