Storage of bagged soil and compost
I have several bags of Compost, mushroom compost, castings, peat Moss and other amendments that I bought for new home. However, I did not end up getting moved in until much later than expected. Some bags have been opened, but are rolled up. Most bags are unopened. Some bags are outside under a tarp and others are in basement. Can you tell me how to store for the winter so it's possible to use again in spring?
You can store unopened bags of amendments either indoors or outdoors under a tarp. Opened bags can be stored in the same places rolled up and taped shut. The only way the amendments would lose their nutrients would be if they were exposed to rain so that nutrients were allowed to leach into the ground, or if they were stored for more than 1-2 years. This article gives more details: