Some are more resistant to disease than other, but the most important thing is to grow them well, in the right conditions for them - plenty of good airflow, correct pruning etc, and don't plant the new ones where the diseased one was. If you can give the names of the ones you've bought, someone will be able to offer more advice, but you can't prevent a disease as such, you would wait until there's any sign of the problem and then address it. Canker, for example, gets in through damaged trunks/branches etc
It's a place where beautiful isn't enough of a word....
rod.52
Posts: 3
Posts
Have you a photo? If they're that bad, it's best to get rid and start again with something else.
If you can give the names of the ones you've bought, someone will be able to offer more advice, but you can't prevent a disease as such, you would wait until there's any sign of the problem and then address it.
Canker, for example, gets in through damaged trunks/branches etc