Irises Soil Mix Recipe & Potting Calculator

Looking to repot your Irises? Using the right soil is critical. Our free calculator provides the exact Heavy-Blooming Flower Soil recipe and calculates exactly how many liters or quarts of soil you need for your specific pot size.

Heavy-Blooming Flower Soil

💡 Why: Annuals and flowering perennials exhaust a lot of energy making blossoms. They need well-draining soil that is packed with phosphorus-rich compost to keep blooming all summer.

⚡ Store Shortcut: Mix a high-quality outdoor Potting Mix with a hearty scoop of organic compost.
Ideal NPK Ratio
N 2
P 3
K 2
Target pH 6.0 - 7.0
Drainage Speed Moderate
Min Pot Depth 8 inches

Calculate Your Exact Soil Need

11.4 Liters (10.4 Dry Qts) ~17.1 lbs wet (7.8 kg)