Commercial composts may be hot composted which works much quicker than normal. New Horizon can be dark and crumbly or pale and with a pine resin smell. I reckon it depends on the garden waste, lots of pine cuttings means woody compost. Composts do indeed vary between batches. Some are left in the rain and soak up damp, others are left to dry out.
Hi aym280. I will check next time I go up the allotment.
I discovered last summer that Which! tests different sorts of composts to see how well they grow different sorts of plants. there are customer ratings too. Have a look on their website. You might not want to take their advice, but it at least tells you which to avoid at all costs so might save wasting some money.
Hi aym280. The compost is J. Arther Bower. £3 for 50ltr at B+M. They also have one called New Horizon, £2 for 35ltr. This is a little rougher than JAB but smells sweet. I had bought two and having checked it went back and bought another three. Ideal for topping up my potatoes in sacks.