foliage on my marigolds have gone rusty??

planted a nice row of marigolds along the front of my veg plot as it "apparently" keeps some pests away. been in place around 3 weeks and alot of the foliage has started to look rusty??? thats the best way i can describe it. any ideas??

 

calendula rust????? ( photo / image / picture from lukeypukey's Garden )

here is the problem, not sure what it is and can't seem to find any info on it








calendula bloom ( photo / image / picture from lukeypukey's Garden )


the first bloom

 

That looks like a nutrient deficiency. I was thinking maybe you had a rust-like fungus, but I have never seen that on marigolds. so thanks for the picture. Give it a side dressing of some compost or fertilizer and see if that helps. Good luck

 

thanks carolyn, i'll give them a feed and see how they go :-D

 

I have never had that problem but with mine this summer something is chewing on them...I think it is a bug.

 

I am tending to guess that it may have something to do with coolness, wind and water exposure.
I wonder what the underside of the leaf looks like.
If this discolouration was indeed caused by the elements, the calendula will grow on through it without problem.

I will mention though, that you have what appears to be a worse problem afoot--I believe that I see Equisetum arvense poking it's unwanted three little heads heads out of the soil near what could be a paving stone at the bottom of the first foto.

 

Sjoerd, You are really observant and I think you are totally correct. I have a patch of these in a raised bed with a hemlock on it and it is awful to get rid of it. They came in the soil for the raised bed. YUCK!

 

you would be correct, i have masses of horsetail that im struggling to shift. i spend the majority of my time in the garden pulling the stuff up!! i've tried glyphosate which just damaged the green up top and it soon grew back. i've been advised to let it get some good growth then go around and crush it a little by standing on it, and then spraying again with a glyphosate and parrafin mix . . . see what happens after that.

 

i did a bit of research when i discovered it in my garden and it apparently survived the ice age!! the roots have been found 7 meteres down, if you have it carolyn i'd try and shift it fast before it gets out of hand