Power SI Original Silica Supplement, Plant Strength Additive with Monosilicic Acid, Improves Nutrient Uptake, Stalk Support and Stress Resistance, 250ml fl oz Bottle
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This item is eligible for return within 30 days of receipt
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Availability:
In Stock.
Arrives
Sep 5 – Sep 12
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Features
- STRENGTHENS STEMS AND STRUCTURE FAST: A silica supplement for plants that reinforces stalks and branches, builds tighter internodes and supports better plant structure across all plant types
- ADVANCED SILICA TECHNOLOGY FOR FASTER UPTAKE: Formulated with stabilized monosilicic acida highly available form of silicon that absorbs quickly and enhances nutrient transport from root to canopy
- IMPROVES NUTRIENT UPTAKE AND STRESS RESILIENCE: Acts as a nutrient uptake booster while improving stress resistance to heat, drought and salinity for stronger performance in indoor or outdoor conditions
- VISIBLE RESULTS WITHIN DAYS OF FIRST APPLICATION: Notice thicker stems and sturdier growth within a few daysthis plant strength supplement delivers results even seasoned growers can see quickly
- PLANT-SAFE FORMULA WITH NO DYES OR PGRS: A clean plant nutrient that contains no synthetic additives, dyes or PGRssafe for edible plants and compliant with professional growing standards
- LOW DOSE, HIGH EFFICIENCY SILICA SUPPLEMENT: This highly concentrated formula requires only 1 mL per gallon, making it a cost-effective silica additive for daily or weekly feeding schedules
- COMPATIBLE WITH SOIL, HYDRO AND COCO SYSTEMS: Mixes instantly with no clogging or sedimentfully compatible with hydroponic systems, soil and coco-based media
- TRUSTED BY GROWERS WORLDWIDE FOR PERFORMANCE: A premium plant supplement used globally by top growers who rely on Power Si for tank stability, consistent uptake and visible strength gains
Brand: Power Si
Item Weight: 0.7 Pounds
Coverage: Medium
Liquid Volume: 250 Milliliters
Mixing ratio: 2128
Product Dimensions : 4 x 4 x 3 inches; 11.2 ounces
Item model number : PSO250
Date First Available : April 7, 2022
Best Sellers Rank: #206,132 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #3,503 in Garden Fertilizers
#3,503 in Garden Fertilizers:
Customer Reviews: 4.2 4.2 out of 5 stars 45 ratings
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sep 5 – Sep 12
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Amazing
Reviewed in the United States on July 20, 2025 by Mr.Bigstuff
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
Got some sturdy stalks on my plants, keeps ph stable in reservoir
Reviewed in the United States on July 27, 2024 by John
My bottle expires 30 days after I received it. Past use of power si was fantastic. Power si is a great addition to your feeding schedule. However as stated I recieved an inferior product from this seller
Reviewed in the United States on April 18, 2025 by joe b.
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
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 by User555 User555
Reviewed in the United States on May 29, 2024 by Brandon Doucette Brandon Doucette
I asked my friend how much power si I should use and he thought I asked how much power si he used…… long story short, he has thirty nine plants and I have six, I used 30ml of power si every feeding for 7 weeks! It did not hurt the plants but instead made the stalks like bamboo, during the whole grow I did not have a leaf turn color and fall off! I was afraid that the plants were going to die because of my mistake but the Crop turned out great and I want to let anyone know who accidentally over feeds power si that it’s going to be ok
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Reviewed in the United States on December 7, 2024 by Sly Dittin Sly Dittin