I think that fine-grade rock dust is better as its nutrients should be more available to plants. I was given this advice by an Australian quarry-man who had conducted trials on different grades of rockdust, over 30 years.
Forum Info
- Registered Users
- 35,010
- Forums
- 10
- Topics
- 2,940
- Replies
- 10,417
- Topic Tags
- 567
- Empty Topic Tags
- 2,261