Grow More® Standard Fertilizer 05-10-40 — 25 lb

High-Potassium Water-Soluble Fertilizer for Hardening, Cool Climates, and Crop Finish — Grow More 05-10-40

Grow More® Standard Fertilizer 05-10-40 is a 100% water-soluble, high-potassium formula designed to deliver the elevated potassium levels that crops need during the hardening phase, in cool-temperature climates, or during early spring when plants benefit from additional potassium for cold tolerance and structural reinforcement. Its low nitrogen content minimizes excessive vegetative growth while the dominant potassium drives cell wall strength, disease resistance, and preparation for harvest.

Key Features & Benefits

• 05-10-40 NPK Ratio: Dominant potassium with moderate phosphorus and minimal nitrogen — precisely calibrated for hardening crops, cool growing conditions, and the final stages of production when potassium demand peaks.
• Water Soluble Hardener: Specifically designed for cool-temperature climates, dark weather conditions, and early spring applications when crops need potassium-driven structural support without excess vegetative stimulus.
• 100% Soluble Foliage Spray: Can be applied as a foliar feed on fruit and crops nearing maturity, leaving little to no visible residue at harvest for clean, market-ready produce.
• Drip-Irrigation Compatible: Fully dissolves without clogging emitters or lines — suitable for injection into drip systems, overhead irrigation, and fertigation programs at scale.
• High Solubility and Purity: Formulated with highly soluble, pharmaceutical-grade salts that provide reliable, consistent nutrition without the variability associated with lower-purity fertilizers.
• 25 lb Bag: Large-volume format ideal for commercial growers, nurseries, and operations requiring frequent high-volume fertilizer applications.

Who Should Use This

Grow More 05-10-40 is the tool of choice for commercial vegetable, fruit, and nursery crop producers who need to harden crops for transplant, ship, or storage, and for growers working in cool climates or during early spring when cold stress management is a priority. It is also well suited to the final crop phase when pushing potassium levels without adding additional nitrogen benefits brix, skin firmness, and overall harvest quality.

Compatibility

Compatible with drip irrigation, overhead sprinklers, and foliar spray applications. Can be used in conjunction with other Grow More water-soluble fertilizers as part of a staged feeding program — pair with a higher-nitrogen formula during vegetative growth stages, then transition to 05-10-40 for hardening and finish phases. Fully compatible with most commercial nutrient programs and crop protection spray programs when used at recommended rates.

Frequently Asked Questions

What does “hardening” mean in the context of plant fertilization?

Hardening refers to the process of preparing plants for environmental stress — particularly cold temperatures, transplant shock, or reduced water availability. Elevated potassium strengthens cell walls, improves osmotic regulation, and enhances the plant’s ability to tolerate and recover from physical and environmental challenges.

When during the crop cycle should I use 05-10-40?

Use 05-10-40 during the final 2–4 weeks of production for fruit and vegetable crops, or whenever cool temperatures, overcast conditions, or pre-harvest preparation call for additional potassium support. It can also be used through the entire growing season in programs where potassium-heavy nutrition is preferred.

Can 05-10-40 be used in hydroponic systems?

Yes. Its high solubility and clean dissolving properties make it suitable for hydroponic reservoir use. Incorporate it into your nutrient solution at appropriate rates based on your EC targets and crop requirements, particularly during the hardening and maturation phases.

How does this product compare to 05-50-17 from the same line?

05-10-40 is potassium-dominant and best suited for hardening, cool climates, and crop finish, while 05-50-17 is phosphorus-dominant and best applied during flowering initiation and bud set when plants have a high demand for phosphorus to drive reproductive development.

Is this formula suitable for foliar application on crops close to harvest?

Yes. Grow More 05-10-40 is specifically noted as a 100% soluble foliage spray that can be applied to fruit and crops nearing maturity, leaving little to no visible residue — making it well suited to pre-harvest foliar programs on commercial crops.