Phosphite Fertilizers
PRUDENT® Si
Urea Phosphite Fertilizer + Silicon
Prudent® Si is a high-performance 6-0-0 fertilizer that delivers all the benefits of urea phosphite, now enhanced with silicon (Si) to support stronger plant structure, durability, and stress resistance. Prudent Si is formulated for a wide range of uses and is compatible with most fertility programs. It is easy to mix and can be applied via foliar spray, fertigation, or soil application.
Dual-Action Technology
Provides both fast-absorbing phosphite and plant-strengthening silicon to support plant health above and below ground.
Stronger, More Resilient Plant Structure
Silicon reinforces cell walls to promote upright growth, improve physical strength, and reduce the risk of structural collapse.
Maximizes Phosphite Uptake
Urea phosphite's neutral charge improves nutrient absorption through roots and leaves, outperforming traditional potassium phosphite products.
Builds Stress Tolerance
Supports plants under drought, temperature swings, and other environmental pressures by strengthening plant cell walls.
Compatible and Easy to Mix
Works well with most fertilizers, fungicides, and plant protection programs
6-0-0
Total Nitrogen (N)................................................6%
1.0% Ammoniacal Nitrogen
5.0% Urea Nitrogen
Derived from aqua ammonia and urea phosphite
5% Silicon (Si) derived from Silicon Dioxide (SiO₂)
Turf: Apply 1–6 oz. per 1,000 sq. ft.
Begin applications in spring and continue every 7–14 days during the growing season. Apply when plants are actively growing, preferably in the early morning or late afternoon.
Agriculture: Apply 1–4 quarts per acre per application.
Use 2–3 times throughout the season or as needed. Refer to label for crop-specific rates and timing.
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