Sorry Sue, I didn't remember about a lower PH than neutral if we talked about it before. I can't name the rods because I found them already here when we came to live in this house and I left them in their spot since they look healthy and bloom a lot. Well, one blooms wonderfully, it has green leaves and pink flowres, the other seem to struggle a bit, it doesn't grow much, never seen a flower and it has red leaves.
I have yet to find a bag of compost, I have to go in a garden center because there aren't any in common shops, and it' s a trip of about 30 minutes so I'm planning to go when the moment will be right because we're going to have rains and cold again (-1°C to 5°C)