Q.Weed Suppression Membrane Hardens Soil, Should I Dig It Up Annually?
The soil has become rock hard after 3years under the membrane I think it may retard growth of good plants as well as weeds
Certified GKH Gardening Expert
The membrane should be changed out when you amend the soil for the growing season. Sometimes, you can reuse the membrane, but not amending the soil after each season will leave you with compact, unusable soil.
This may require heavy tilling, but earthworms can help, as well.
Here are some articles that will help:
https://www.gardeningknowhow.com/composting/vermicomposting/worm-castings.htm
https://www.gardeningknowhow.com/composting/vermicomposting/creating-worm-beds-in-gardens.htm
https://www.gardeningknowhow.com/special/organic/the-importance-of-soil-for-an-organic-garden.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/improving-garden-soil.htm