six months ago I dug up a huge laurel tree in my plot, I got out most of the root down to about 18 inches and then planted a cornus kousa on top with loads on compost and horse manure.
Unfortunately my cornus is now looking a bit unwell, the leaves are a bit yellowy green I think and some are brown at the tips.
Any ideas?
Not unless the Laurel leaves toxins behind... hardly replanting syndrome, as they aren't related... but often baddies build up around the roots which a grown tree can cope with but a new one can't... ??? Sorry to so little use Stan.
:-\
We had a kornus cousa chinensis for several years. It was making a beautiful shrub, and then last year it died. It was planted with magnolias, rhododendrons and a camellia. They all like neutral to acid soil. Couldn't find any explanation for it whatsoever, other than 'one of those things'.
Do you know the Ph of your soil? It may be worth giving it a dose of ericaceous fertiliser.
valmarg
Two summers ago we had almost Drought conditions ,this can seriously stress some trees and shrubs as canExcessive rain like we had last year,just a thought. :)
it might be the last 3 weeks with virtually no rain and a hot sun.
try some hydro massage with a watering can
here's a couple of pictures of the problem....
(http://homepage.ntlworld.com/stan.shepherd/downloads/q.jpg)
(http://homepage.ntlworld.com/stan.shepherd/downloads/qq.jpg)
does it look like sun burn?
I found this:
http://edis.ifas.ufl.edu/ST191 (http://edis.ifas.ufl.edu/ST191)
"Pests
Several borers will attack dogwood. Try to keep the trees healthy with regular fertilization. Indications of borer problems are holes in the trunk, leaves smaller than normal, and dieback of the crown.
Dogwood club gall midge causes galls at the branch tips. The leaves on affected branch tips may be distorted and the branch may fail to form a flower bud. Prune out the galls as soon as they are seen.
Leaf miners cause brown blister-like mines on the undersides of leaves. The adult leaf miner skeletonizes the leaves.
Scales can build up to large numbers before being detected.
Aphids on small trees may be partially controlled by spraying them with a strong stream of water from the garden hose.
Diseases
Most of the diseases listed are seen most often on Cornus florida . However other dogwoods are susceptible to the diseases listed.
Early symptoms of dogwood canker are smaller and paler leaves. Leaves on infected branches are red earlier in the fall. At first the symptoms appear only on the infected side of the tree but become more general as the canker enlarges. There is no chemical control for the disease. Avoid trunk wounds during and after planting.
Crown canker is associated with wet soils and can be controlled with appropriate fungicides.
Flower and leaf blight caused by Botrytis cinerea attacks fading bracts, especially during wet weather. Infected flower parts fall on the leaves spreading the infection.
A large number of leaf spots attack dogwood. Clean up and dispose of infected leaves.
Powdery mildew covers the leaves with a fine white coating.
Leaf scorch occurs during hot, dry, windy weather. This condition looks like a disease. Scorch symptoms are drying and browning of the leaf margins, or, in more serious cases, drying and browning of the interveinal area."