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9 messages
05/04/2014 at 10:23

http://s4.gardenersworld.com/uploads/images/original/41525.jpg?width=270&height=350&mode=max

 

http://s4.gardenersworld.com/uploads/images/original/41524.jpg?width=270&height=350&mode=max

 

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? 

05/04/2014 at 10:29

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. 

Good luck. 

05/04/2014 at 16:45

Rust and its fatal.

06/04/2014 at 13:26

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.

06/04/2014 at 13:37

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.

06/04/2014 at 13:46

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 

06/04/2014 at 13:51

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!

06/04/2014 at 14:36

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.  

06/04/2014 at 17:54

Sadly this was only its second year. I shall have to see it as an opportunity to try something else.

 

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