Best Fertilizer for New Guinea Impatiens: NPK Ratios and Application Tips

Ideal Nutrient Ratio

Use a fertilizer high in phosphorus, low in nitrogen. The optimal NPK is 5-20-10 (5% nitrogen, 20% phosphorus, 10% potassium). Nitrogen promotes foliage; phosphorus drives flowering and fruit size; potassium strengthens roots and nutrient uptake.

Product Selection and Schedule

• Choose a reputable water-soluble brand (Miracle-Gro, Peter's). Avoid generics—they lack potency.
• Apply at package dilution every 10 days, starting 2 weeks after transplanting.

Soil Amendment

Incorporate organic matter (peat, compost, aged manure) to provide steady nutrients, balance pH, improve drainage, and increase disease/pest resistance.