On 04/10/2011 18:06, stuart noble wrote:
On 04/10/2011 17:16, Spider wrote:
On 04/10/2011 11:03, stuart noble wrote:
Can anyone suggest a reason why about 10% of my violas just drop dead
overnight after a couple of weeks of what seems like healthy growth?
Often it's just one in a line of half a dozen. Most are in semi shade so
they haven't been fried by the Indian summer or allowed to dry out.
I'm wondering whether plug plants can become plug bound in some way if
they put on too much growth too quickly.
I grow them every year and have never had this problem before, so any
thoughts appreciated


I've certainly known plug plants fail because, in the case of herbaceous
plants, the roots can't sufficiently escape the thin fibre pot or, in
the case of shrubs, the roots have been strangled by slotted plastic
pots which are invisible on purchase because the nursery has potted them
on - complete with straitjacket! - into 1ltr or 2ltr pots.

However, I have just lost one of two pots of viola. Both were a bit dry,
but in the shade. One perked up immediately when watered, the other
didn't:~(. Knowing how strong viola roots are (even in dry conditions),
I was astonished and very disappointed. I did wonder if anything else
could have harmed it, but there was no sign of pest, disease or mould.

It sounds as if you have bought a largeish batch of plug-grown violas?
Knowing that the bedding industry has suffered big losses over recent
years (re petunia types and impatiens), I'm wondering if this is a
similar case? Maybe you should contact the nursery and ask if yours is
the only problem case.


Somehow I don't think B&Q will be that interested :-)


You're probably right. Sad but true.


I'm mainly puzzled by the 2-3 weeks of normal growth followed by sudden
death. I might try leaving the dead ones in place to see if nearby
plants follow suit.



I can understand your curiosity but, if they were my plants, I wouldn't
want to take the risk. If the others are going to die, you'll find out
soon enough.

You didn't say (in your original post) whether you'd potted on any or
all of the plants. I think this may be your next step, if you feel they
may be plug-bound. If they have a chance to grow bigger, better roots
then they have an improved chance of fighting off any possible pathogen.

--
Spider
from high ground in SE London
gardening on clay