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5.0 out of 5 stars. 2 reviews
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Power Si 8 oz. (0.23kg) Power Start Dry Plant Supplement with Mycorrhizae and Nitrogen-Fixing Bacteria, 1 pk.

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Power Si 8 oz. (0.23kg) Power Start Dry Plant Supplement with Mycorrhizae and Nitrogen-Fixing Bacteria, 1 pk.

Item # 6042628

Power Si Power Si 8 oz. (0.23kg) Power Start Dry Plant Supplement with Mycorrhizae and Nitrogen-Fixing Bacteria, 1 pk.
Power Si Power Si 8 oz. (0.23kg) Power Start Dry Plant Supplement with Mycorrhizae and Nitrogen-Fixing Bacteria, 1 pk.
$54.99


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  • Online Only

Power Si 8 oz. (0.23kg) Power Start Dry Plant Supplement with Mycorrhizae and Nitrogen-Fixing Bacteria, 1 pk.

Item # 6042628

Power Si Power Si 8 oz. (0.23kg) Power Start Dry Plant Supplement with Mycorrhizae and Nitrogen-Fixing Bacteria, 1 pk.
Power Si Power Si 8 oz. (0.23kg) Power Start Dry Plant Supplement with Mycorrhizae and Nitrogen-Fixing Bacteria, 1 pk.

$54.99
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Power Si Start 8oz is an all-natural microbial root enhancer designed to give your plants a powerful head start. Formulated with four species of endomycorrhizae and nitrogen-fixing bacteria, this supplement improves nutrient uptake, accelerates root formation, and strengthens your plants against stress especially during transplanting. By enhancing soil biology and making nitrogen more available to your plants, Power Si Start promotes vigorous vegetative growth and better long-term plant health. It's ideal for use during propagation, early veg, and transplanting stages, and integrates easily into any existing feeding program.

Looking for more information on fertilizer? Check out our guide on how to read fertilizer numbers in the product documents section.

  • Boosts Early Root Growth Accelerates root development for faster, stronger plant establishment during early growth and transplanting.
  • Packed with Beneficial Microbes Features 4 concentrated endomycorrhizae species and nitrogen-fixing bacteria to improve soil health and nutrient availability.
  • Improves Nutrient Uptake Helps plants absorb more nutrients and water, supporting stronger vegetative growth.
  • Reduces Transplant Shock Helps plants adapt quickly to new environments by reducing stress and promoting resilience.
  • All-Natural & Easy to Use Made with organic, plant-safe ingredients. Perfect for seedlings, clones, and transplants in any growing medium.

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1 to 2 of 2 Reviews .
1 – 2 of 2 Reviews
Review 1

My plants are growing strong

2 months ago
I’m really happy with this product. I used it for transplanting my plants into bigger pots and it worked great. The powder is really fine, making it easy to work with and making it easier for the plants to absorb. Maintenance is simple, and the powder form is convenient to use.

Originally posted on GrowGeneration, Inc.

Review 1

Exponential growth

2 months ago
PowerSi power starts functionality is amazing and application is so easy you can’t help, but love this product. It has taken my magnolias to new heights. I love that it comes in a powder for safety reasons. You get a lot in a package as well which is really nice.

Originally posted on GrowGeneration, Inc.