John Innes No.3 Mature Plant Compost 10L

John Innes No.3 Mature Plant Compost 10L is a nutrient-rich growing medium specially designed to support established plants with higher feeding requirements. Based on the traditional John Innes formulation of sterilised loam, peat, and horticultural grit, it provides excellent structure, moisture retention, and drainage for strong root development. Ideal for repotting or planting out mature plants, this richer compost supplies sustained nutrients to encourage vigorous new growth and long-term plant health.

• 10L bag of compost formulated for mature plants

• Nutrient-rich mix for plants with higher feeding needs

• Feeds plants for up to 5 weeks after potting

• Encourages strong root systems and fresh new growth

• Loam-based structure for stability and moisture retention

• Added grit improves drainage and aeration

• Ideal for repotting or planting out established plants

• Suitable for large pots, tubs, and containers