I use the leaves for cooking and the plant has done well up to now but several leaves underside, have started to develop what appears to be white web like mildew. How do I treat it on the vine so I can still use the leaves.
I wouldn't count on eating any of the affected leaves. Powdery mildew is hard to treat once it takes hold. Here is more:
https://www.gardeningknowhow.com/edible/fruits/grapes/treating-grapevine-problems.htm
https://www.gardeningknowhow.com/edible/fruits/grapes/powdery-mildew-on-grapes.htm
Can you help please. Why are the leaves turning yellow and brown and it is not August yet. Is it over watering? Or a disease? If the latter what do spray / treat with? Many thanks in advance. Ian Anderson
It could, certainly, be a bit of both! Be sure that the soil has a chance to dry out quite a bit between waterings. Anywhere between 10-15 cm should be let to dry out to avoid issues with bacteria and fungi.
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
I planted 4 grapevines about 2 years ago. My grapes are round and small like the size and shape of a marble. They were supposed to be ordinary grapes, no special shape hybrid. The vines look great. What am I doing wrong?
It looks like these may be muscadine grapes; this is their natural shape. Perhaps you need to prune them more often. Here's an article that should help: https://www.gardeningknowhow.com/edible/fruits/grapes/pruning-muscadine-grapes.htm
t in Hudson transplan The plant (s) have healthy roots and come from cold weather stock. Help!!! George
As long as the temperatures are not really hot at this time, then you may plant. If it is still quite warm, then I would wait until it cools off. This article will help you to grow grapes:
https://www.gardeningknowhow.com/edible/fruits/grapes/growing-grapevines.htm
One vine is about 4 years old and the other 2 are 3 years old had no grapes on the older plant this year but all the leaves are like a cup I have read it’s from using roundup but I have never bought that stuff. Hope someone can tell me. Thanks for your help
This reminds me of the beginnings of grape leafroll virus. Viral infections have no cure, but you can destroy the vines, and purchase some that are resistant to the disease.
https://www.gardeningknowhow.com/edible/fruits/grapes/grapevine-leafroll-control.htm
We have a small trellis and would like to buy 10 white & 10 red grafted grape vines -we live in Canberra so they need to be suitable for cold climates - where to buy them and how much should 20 vines cost? with thanks Erica
Unfortunately, we do not sell plants. We only offer information on them. Your climate is, actually, what we consider to be on the warmer side! You will be the equivalent of our USDA zone 9. Finding grapes for climates that don't get well below freezing can be challenging, since most need that very cold to enter dormancy.
We do have an article that will suggest grapes that will do well in your climate, though.
This is the first year the plants are in the ground and the deer have just eaten a lot of the leaves. Then stems are still there.
They should regrow. Young vines as well as grapes are favorites of deer. You may want to erect a fence around your grapevines.
https://www.gardeningknowhow.com/plant-problems/pests/deer/deer-repellents.htm