Register with us or sign in
in Problem solving
My young hollyhocks (I hope that's what they are) have orange yucky looking spots on them. At the moment I have just removed the worst leaf, but I'd be interested to know what it is, is it terminal, do I have to do more than just remove leaves?
Afraid that's hollyhock rust not usually terminal but disfiguring. Various methods of control here http://apps.rhs.org.uk/advicesearch/Profile.aspx?pid=564
Remove affected leaves and burn.
In the past I've found that hollyhocks grown in poor ground without the use of fertilisers manage to avoid succumbing to rust far better than those grown in rich soils with the use of fertilisers.
Rust and its fatal.
Oh no! Please don't spare my feelings flowering rose. I'll take a look at the web link and hope for the best. Thanks for the identification and advice.
Hmm, it is damp here and I've maybe crowded the plant a bit. I guess if a pant isn't right for a place it lets you know.
Yep, I agree rust is just about terminal I'm afraid.
Used to grow them up to 8' high and were superb ....until,they got the rusts!
Best grown as annuals...unless "they" have come up with a resistant variety
I had to give up growing them because of rust, Kirsty. They used to grow fine many years ago but it seems the air pollution back then (sulphurous smoke from burning coal) actually helped protect against it. I have tried spraying with fungicide from seeding emergence to adulthood, different soil types and planting aspects, and pots. Nothing prevented rust finally killing the plants, but some of them did get to produce nice flowers, although the ugly rusted leaves and stems always took away a lot of the pleasure. The good news is there are lots of other plants so I don't miss them too much!
Hmm, I've usually managed to enjoy hollyhocks for a few years (2 or 3 at least) before they turn up their toes. Then I have a break from them from a few years, and then have another go.
But as I said, I do find that growing them hard and tough in poor soil does help. I've not tried them in the lovely soil in this garden.
Sadly this was only its second year. I shall have to see it as an opportunity to try something else.