What is John Innes?
Demystifying John Innes: The UK Gardener's Go-To Potting Compost
For many UK gardeners, "John Innes" is synonymous with quality potting compost. But what exactly is it, and why is it such a popular choice? Let's delve into the history and benefits of this iconic brand, ensuring your plants thrive from seed to bloom.
A Legacy of Innovation:
John Innes was a renowned British horticulturist who, in the 1930s, developed a series of standardised potting composts based on scientific research. These numbered grades, each with a specific nutrient balance, revolutionised plant propagation and container gardening. While the John Innes Institute no longer directly produces compost, the name lives on, licensed to various manufacturers who uphold the original formulations.
Understanding the Numbers:
The most common John Innes composts you'll encounter in UK garden centres are:
- No.1 Seed Compost: Ideal for delicate seedlings and cuttings, with a fine texture and low nutrient content to prevent "damping off".
- No.2 Potting Compost: Perfect for potting on young plants after germination, offering a balanced blend of nutrients for healthy growth.
- No.3 Compost: Designed for established, flowering, and fruiting plants, providing sustained nourishment for optimal performance.
Key Advantages of John Innes:
- Tailored Solutions: With numbered grades for different plant stages, you can provide targeted nutrition for each stage of growth.
- Peat-Free Options: Many manufacturers offer peat-free versions, catering to environmentally conscious gardeners and supporting sustainable practices.
- Widely Available: John Innes is a convenient and familiar choice in most garden centres and online retailers.
Beyond the Numbers:
Remember, John Innes is just a starting point. You can customise your compost further by adding:
- Grit or perlite: Improves drainage, especially beneficial for succulents and cacti.
- Sand: Promotes drainage and aeration in heavier soils.
- Mycorrhizae: Beneficial fungi that enhance nutrient uptake and root health.
- Worm castings: Adds organic matter and nutrients for a slow-release boost.
Embrace the Tradition:
With its rich history and reliable performance, John Innes compost remains a trusted choice for UK gardeners. Understanding the numbered grades and potential enhancements empowers you to create the perfect plant-growing environment, ensuring bountiful harvests and vibrant blooms.
