Grow More® Standard Fertilizer 05-50-17 — 25 lb

High-Phosphorus Water-Soluble Fertilizer for Flowering Initiation and Bud Set — Grow More 05-50-17

Grow More® Standard Fertilizer 05-50-17 is a 100% water-soluble, high-phosphorus formula engineered to support the critical transition from vegetative growth to reproductive development. With an extreme phosphorus concentration of 50%, this fertilizer delivers the phosphorus intensity that flowering and fruiting crops demand at bud set and early flower development — when phosphorus availability directly impacts the number, size, and quality of blooms and fruit produced.

Key Features & Benefits

• 05-50-17 NPK Ratio: Extreme phosphorus concentration with supporting potassium and minimal nitrogen — precisely formulated for flowering initiation and bud set when plants transition from vegetative to reproductive growth.
• Flowering Stage Specialist: The high phosphorus-to-nitrogen ratio signals plants to shift energy from foliage production to bud and flower development, supporting more prolific and earlier-initiating bloom sets.
• 100% Soluble Foliage Spray: Can be applied as a foliar feed on flowering and fruiting crops, leaving little to no visible residue — suitable for use close to harvest on market-grade produce.
• Drip-Irrigation Compatible: Fully dissolves without clogging emitters or irrigation lines — designed for injection into drip, overhead, and fertigation delivery systems at commercial scale.
• High Solubility and Purity: Formulated with highly purified, soluble salts for consistent, predictable nutrient delivery with minimal variability across applications.
• 25 lb Bag: Large-format bulk packaging designed for commercial growers and nurseries requiring regular, high-volume fertilizer applications.

Who Should Use This

Grow More 05-50-17 is the preferred choice for commercial vegetable, flower, and fruit crop producers who need to maximize flowering and fruiting performance at the critical bud-set stage. It is particularly valuable in greenhouse and controlled-environment operations where precise nutrient timing at the vegetative-to-reproductive transition is key to achieving top-tier commercial yields.

Compatibility

Compatible with drip irrigation, overhead sprinklers, and foliar spray applications. Best used as a transition fertilizer — switch from a balanced or higher-nitrogen formula at the onset of flowering to 05-50-17 for 2–4 weeks to drive bud set, then transition to a finish or bloom-maintenance formula. Fully compatible with most commercial nutrient programs at recommended application rates.

Frequently Asked Questions

When during the crop cycle should I use 05-50-17?

Use 05-50-17 at the onset of the flowering stage — from the first signs of bud initiation through early flowering. This is when phosphorus demand is highest and when phosphorus supplementation has the greatest positive impact on the number and quality of flowers or fruit produced.

How does phosphorus trigger flowering in plants?

Phosphorus is a critical component of ATP (adenosine triphosphate), the energy currency of plant cells, and plays a central role in the signaling pathways that trigger flower bud initiation. An abundance of available phosphorus at the right developmental stage accelerates the shift from vegetative to reproductive growth.

Can I use 05-50-17 for the entire growing season?

While 05-50-17 can technically be used throughout the growing season, its extreme phosphorus level is most impactful and cost-effective when applied specifically during the flowering initiation and bud set phase. Using it throughout vegetative growth would supply more phosphorus than is typically needed at that stage.

How does 05-50-17 compare to 05-10-40 from the same line?

05-50-17 is phosphorus-dominant and optimized for flowering initiation and bud set. 05-10-40 is potassium-dominant and best suited for crop hardening, cool-climate applications, and the final pre-harvest phase when potassium is the primary nutritional priority.

Is 05-50-17 suitable for use in hydroponic systems?

Yes. Its high solubility makes it well suited for hydroponic reservoir use. Add to your nutrient solution at appropriate rates calibrated to your EC targets, particularly during the flowering initiation phase when switching from a vegetative nutrient program.