Grow More makes a line of water-soluble fertilizers that map well onto the distinct nutritional phases of pepper production. This guide covers which formulations to use at each stage, how to mix them, and how to adapt feeding strategy by growing system.

Quick Reference

  • Seedling and transplant: 20-20-20 at 1/4–1/2 tsp/gal
  • Early vegetative: 30-10-10 to push leaf and stem growth
  • Pre-bloom: 10-55-10 to initiate flowers
  • Fruit fill and ripening: 5-10-40 or 6-30-30 every 7–10 days
  • Supplement with calcium nitrate at fruit set to prevent blossom end rot
  • Flush every 3–4 weeks in containers to prevent salt buildup

Understanding Fertilizer Needs by Growth Stage

Pepper plants shift their nutritional priorities as they develop. Feeding the same formula throughout the season is a common mistake that costs yield. The four main stages each call for a different emphasis.

  • Seedling: Light feeding; balanced or mild nitrogen formulations
  • Vegetative: Emphasis on nitrogen for leaf and stem development
  • Flowering: Shift toward phosphorus and potassium to initiate blossoms
  • Fruiting and ripening: Potassium and micronutrients for size, flavor, and color

Grow More Products for Pepper Plants

Product (N-P-K) Best Used During Nutrient Emphasis Application Notes
20-20-20 Seedling & Transplant Balanced all-purpose Use at 1/4–1/2 tsp/gal weekly or bi-weekly.
30-10-10 Early Vegetative High Nitrogen Stimulates leaf growth in early stage. Avoid overuse.
10-55-10 Pre-bloom / Flower Initiation High Phosphorus Used before and at the start of flowering.
0-50-30 Flowering / Early Fruiting Extreme P-K Boost Powerful bloom booster. Use cautiously.
5-10-40 Fruit Fill & Ripening High Potassium Supports large, flavorful fruit. Use every 7–10 days.
6-30-30 Bloom Support High P-K Use during peak flower and early fruit set.
Seaweed Extract All stages Micronutrients & Hormones Improves stress tolerance and overall vigor.
Calcium Nitrate Fruit Set Calcium & Nitrate N Prevents blossom end rot. Use as supplement.
Iron Chelate 6% As needed Iron (Fe) Corrects yellowing from iron deficiency.
Magnesium Sulfate As needed Magnesium + Sulfur Supports chlorophyll and enzyme function.

Mixing and Dilution Guidelines

Start seedlings at 1/4 tsp per gallon with a balanced formula like 20-20-20. Move to 1 tsp/gal of 30-10-10 weekly during vegetative growth. Begin bloom formulas (10-55-10 or 0-50-30) once plants start to branch or show pre-flower buds. Transition to 5-10-40 or 6-30-30 as fruit sets, and continue through ripening.

Always dissolve powders completely before applying. Flush every 3–4 weeks in containers or greenhouses to prevent salt buildup. For foliar feeding, dilute to 1/4–1/2 strength and apply at dusk or dawn to avoid leaf burn.

Product Compatibility and Nutrient Management

Most Grow More products mix well together and with standard supplements. Calcium nitrate should not be combined with phosphates in the same tank—apply them separately. Iron chelate and magnesium sulfate work best as corrective foliar treatments rather than regular feed components. Target solution pH of 5.8–6.5 for best nutrient uptake.

Usage by Growing System

Containers: Flush with plain water every two weeks. Feed at lower doses more frequently (weekly rather than bi-weekly).

Greenhouses: Monitor EC (electrical conductivity) regularly. Mix in large batches and pre-dissolve powders before adding to tank.

Field and garden beds: Water deeply after feeding to prevent leaf burn from residual salts. Supplement with organic matter or compost tea when possible.

Grower’s Takeaway

  • Match the formula to the stage—nitrogen-heavy feeds during fruiting suppress yield
  • Calcium nitrate at fruit set is cheap insurance against blossom end rot
  • Container growers: flush regularly or salt buildup will cap your results
  • Always check solution pH—5.8–6.5 keeps everything available

Sources & Further Reading

  • Priest, C.T., and D.J. Austin. The Chile Pepper Almanac. Harambe Publishing, 2026. Amazon