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Power Si

PowerSI 1L Original Silica Supplement, Plant Strength Additive with Monosilicic Acid, Improves Nutrient Uptake, Stalk Support and Stress Resistance,

  • Based on 27 reviews
Condition: New
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As low as $24.83 / mo
  • – 6-month term
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This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: In Stock.
Fulfilled by OMEGA STAR
Arrives Jun 26 – Jun 28
Order within 10 hours and 56 minutes
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Size: 1 L


Features

  • Strengthens Plant Structure Reinforces stems and branches, improving resilience against stress and environmental factors.
  • Maximizes Nutrient Uptake Increases nutrient absorption for optimal plant growth and overall health.
  • Highly Concentrated & Fast-Acting Small doses deliver powerful results, making it a cost-effective solution.
  • Boosts Growth & Yield Supports vigorous development, leading to stronger, healthier plants and better harvests
  • Compatible with All Grow Systems Works seamlessly with soil, hydroponics, coco, and any nutrient regimen.

Brand: Power Si


Item Weight: 0.55 Pounds


Item Form: Liquid


Liquid Volume: 1 Liters


Specific Uses For Product: Plant Growth


Product Dimensions ‏ : ‎ 9 x 3 x 3 inches; 8.8 ounces


Item model number ‏ : ‎ n_ps_003


Date First Available ‏ : ‎ April 7, 2022


Manufacturer ‏ : ‎ Canopy Crop


Best Sellers Rank: #109,035 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #1,979 in Garden Fertilizers


#1,979 in Garden Fertilizers:


Customer Reviews: 4.6 4.6 out of 5 stars 27 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jun 26 – Jun 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Expensive but effective.
Size: 1 L
Product does work as described. Most silica additives are not effective at all (IMO).aside from price, I like it.
Reviewed in the United States on October 7, 2025 by Eric J.
    • If you’re not running this in your feeding you’re cheating yourself.
Size: 1 L
Best silica in the horticulture industry period. Potassium silicate has nothing on this.
Reviewed in the United States on March 13, 2026 by Esteven
    • It works better then all silica
Size: 250 ML
Amazing
Reviewed in the United States on July 20, 2025 by Mr.Bigstuff
    • My girls have stunning vigor!
Size: 250 ML
A must use additive for cannabis. I could build furniture with my stems and have had no issues with disease or pests. A little pricey but it lasts a long time. Use with PowerSI Bloom in flower.
Reviewed in the United States on July 28, 2024 by slrva
    • Nearly expired Nearly expired
Size: 250 ML
Review Image by User555
Be weary of the expiration dates on your bottles before you open them. This one came with 32 days before it expires. This bottle will last me months
Reviewed in the United States on February 20, 2025 Reviewed in the United States on February 20, 2025 by User555
    • Hmmm
Size: 1 L
Husband says Can’t use it clogged my droppers so I have to use it as a FOLIar spray
Reviewed in the United States on March 30, 2025 by ShopSavvyWithAmber
    • Great quality, great results
Size: 250 ML
Saw great root growth and development in vegetative plants. Been mixing 1ml/gallon then applying as foliar spray right before lights out with the left over going into the plant pots; 1x per week. A little bit of Power SI goes a long way. Will continue to use and buy in the future.
Reviewed in the United States on May 9, 2023 by zondo89
    • EXPIRED BOTTLE!!! Too expensive for that lack of detail EXPIRED BOTTLE!!! Too expensive for that lack of detail
Size: 250 ML
Review Image by T. Maldonado
Nothing more frustrating than getting ready to start a new transplant when you see the expiration date on a BRAND NEW BOTTLE! my expiration date is the same as the day they shipped my order!!!! Won’t be getting this brand again!
Reviewed in the United States on March 28, 2025 Reviewed in the United States on March 28, 2025 by T. Maldonado

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