Author: Tony Callaghan

TL;DR Yes — you can use Multipurpose Compost (MPC) as a short-term mulch, but it’s rarely the best or longest-lasting option. MPC breaks down fast, can crust when dry, and encourages weed growth. If you want moisture retention and weed suppression, go coarser — think bark, wood chip, or leaf mould. See the in-depth guide: How…

If you’ve ever opened a bag of compost and spotted a bit of plastic, glass, or grit, you’re not alone. A decade ago this was common — especially in peat-free composts made from recycled green waste. Today, however, the picture has changed dramatically. Most modern Multipurpose Composts  (MPCs) contain no green waste at all. Instead,…

TL;DR: If your compost has gone hard and water just runs off, don’t panic. Break it up, add water slowly in stages, and give it time to re-absorb. For severely dried compost, the only reliable fix is either a commercial wetting agent or a natural humus suspension. Why Compost Dries Out Bagged Multipurpose Compost (MPC) can…

Short answer:You can assess compost quality with a few simple at-home checks — no lab required. These tests help you tell if a mix is too wet, too woody, or poorly balanced before planting. 1. The Squeeze Test — structure and moisture This simple test gives a quick read on porosity and water-holding capacity —…

Most Multipurpose Composts are made using recycled organic materials such as green waste. During processing, small pieces of plastic, glass, or metal can be left behind, especially when the raw materials come from household or garden collections. Even though UK composts made to PAS 100 and similar standards are screened and quality-checked, these standards still…

Short answer:Some Multipurpose Composts are very sustainable, others far less so. The difference lies in the ingredients, sourcing, and packaging. What makes a compost sustainable? What to look for on the bag If this information is missing, sustainability is uncertain. Learn more For a deeper look at how ingredients, transport, and packaging affect compost carbon…

TL;DR:Use a specialist compost when your plants genuinely need a very specific pH, nutrient, or drainage balance — for example, seeds, ericaceous plants, orchids, or citrus. For most other “for tomatoes/roses/vegetables” mixes, a good-quality Multipurpose Compost  (MPC) plus the right feed at the right time will do the job just as well. Why it matters…

Short answer: No — they serve similar roles but are very different in composition, biology, and behaviour. What’s the difference? Aspect Multipurpose Compost (MPC) Home / DIY Compost Purpose Formulated, consistent growing medium for containers and pots Recycled organic matter used as a soil improver Ingredients Peat-free blends of wood fibre, coir, composted bark, green…

Multipurpose Compost (MPC) is a flexible, ready-to-use growing medium designed for containers, raised beds, and general soil improvement. While convenient, it has limits — understanding how to use it well makes all the difference. Pots & Containers Feeding After Compost Most bagged Multipurpose Composts contain enough nutrients to support plants for around four to six weeks.…

TL;DR: Most bagged “Multipurpose Composts” (MPC) are formulated growing media that give fast plant performance but are not humus. True compost (e.g., PAS100-certified green-waste compost) is biologically active and still decomposing; humus is the stable end-product that forms slowly in living soils. Quick Answers (FAQ) 1) Are compost and humus the same? No. For the…