RE: Hollyhocks
- Subject: RE: Hollyhocks
- From: "Marilyn Dube" m*@easystreet.com
- Date: Tue, 7 Jan 2003 13:13:58 -0800
Does anyone have any suggestions for rust on Hollyhocks, Malva &
Snapdragons? I love all of these - they are so cottage garden wonderful.
But the rust is a real ugly turn off. Other areas of the US, with much
higher humidity than the PNW, grow beautiful hollyhocks without rust. And,
there is nothing prettier for cut flowers than Snapdragons in MHO until the
rust arrives.
I only ever had one rose that got rust and I finally pulled it out. Now I
have Hypericum 'Albury Purple' with terrible rust - after growing it clean
for years - many gardeners here said they had rust on it starting last
spring. (Interestingly, there is no rust on the other 3 shrubby Hypericums
I grow). I cut it to the ground & it was clean until about 2 weeks
ago....now it is covered with rust again and so I will reluctantly pull it
out.
I suppose the answer must be a systemic fungicide, but I really hate to
start spraying things. I don't have the commitment to it that is necessary
to be successful.
Marilyn Dube'
Natural Designs Nursery
Portland, Oregon
-----Original Message-----
From: owner-perennials@hort.net [o*@hort.net] On Behalf
Of ECPep@aol.com
Sent: Tuesday, January 07, 2003 8:41 AM
To: perennials@hort.net
Subject: Re: Hollyhocks
In a message dated 1/7/03 10:13:41 AM Eastern Standard Time,
logicpilot@worldnet.att.net writes:
> beetles do too. So I stopped growing these plants for years now. But,
this
> year I'm going to try once again. Any one have ideas about the beetles?
You can grow these large leafed plants without beetle damage if you are
willing to dust them continuously. When the rain washes off the dust, you
have to replace it. You will keep the plants reasonable free of JB's but
will have to put us with a plant covered with some kind of pesticide dust.
Pyrethrum or rotenone will do it. They will avoid leaves and flowers with
any
dust residue.
That being said, I have wondered if some other compound, even a non-lethal
sort might have the same effect. JB's are on plants only in the sun hours.
On shaded days or after the sun goes down, they drop off into the soil and
are cleverly hidden until the next hot sun. They tend to feed when you are
less interested in being in the garden. A friend tried some flour and some
cornstarch. Both change properties when wet so that was not a good idea.
It
would need to be something lightweight and if green would not be noticed
much. Something to work on.
Claire Peplowski
NYS z4
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