Best in 7 days
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Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 25 - Jul 30
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Nutrifield SI-PHISi Phi is a synthetic blend of potassium silicate (Si) and potassium phosphite (Phi). Silica supports and strengthens cell walls, and promotes tolerance to heat and drought stress. Occasional or prolonged high temperatures can cause different physiological and biochemical changes in the plants. These variations effect plant growth as well as development and reduced yield and quality. Use Si Phi throughout the entire grow cycle to ensure plants thrive
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.2 ★★★★★
Based on 91 reviews
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Product Reviews
★★★★★ 5
Saved money
Size: One Size, Style: Select
Nice quality part, cheaper than auto parts store if you have the time to wait on prime
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
★★★★★ 5
good stuff
Size: One Size, Style: Select
it works good!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
★★★★★ 5
Oil filter.
Size: One Size, Style: Select
Filter and included o-ring fit perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
★★★★★ 5
Can’t go wrong with k&n
Size: One Size, Style: Select
Easy to install, works as it should.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 8, 2025
★★★★★ 5
Fits a 3.6 v6 Ram 1500 classic
Size: One Size, Style: Select
Good for my truck
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
