I have a nectarine tree. It had fruit on last year and was fine this year, 2018. It's now 29 April and no sign of leaves or any life. It's got some very small buds on but that is it. I am beginning to wonder if it's dead, or could it be we had a colder winter this year? It was in a pot in the conservatory over the winter, which is quit warm. Now it's in the green house.
Do the branches bend or snap off?
Do a scratch test on the bark.
https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-scratch-test.htm
Did you have a cold snap after buds had been set? This can often happen and the buds will die off in the cold.
If this was in too warm of an environment you may not have had enough chill on the tree to produce buds.
Nectarine tree has alot of fruit, however, I notice that some of the fruit has a white substance over them which I can actually wipe off. What can I do to prevent this and is their something safe that I can spray on the fruit now or is it too late. The fruit is delicious.
The white powdery stuff on the bark is probably white peach scale. It spreads quickly so control is important. Dormant Oil sprays will help control it as will summer applications of Horticultural Oil. Direct summer sprays to the scale on the bark, minimizing contact with the leaves.
https://www.gardeningknowhow.com/edible/fruits/peach/common-peach-diseases.htm
Peaches are pruned in late winter just before spring growth. Sprays for insects and diseases are usually required several times during the season.
My white nectarine tree has double fruit and are small.
Usually, this is caused by malnutrition, but can also be caused by insect damage, or infections depending on exactly how it appears. Without seeing it would be hard to say.
In the meantime, this collection of articles will help you to grow these trees: https://www.gardeningknowhow.com/edible/fruits/nectarines
I bought a pear tree and this is its first fruit but i have never see a pear like this before ..
That is, either, a nectarine or plum. These articles will help you to care for them: https://www.gardeningknowhow.com/edible/fruits/nectarines/growing-nectarine-fruit-trees.htm
https://www.gardeningknowhow.com/edible/fruits/plum/growing-plum-trees.htm
For two years in a row the nectarine has been covered in black mites in August/ September, and then we get no fruit There are heaps of buds on the tree and it looked perfect last week.
Here is a suggested spray schedule that should take care of them.
https://s3.wp.wsu.edu/uploads/sites/2086/2014/05/spray_home_peaches1.pdf
pots? Unheated greenhouse or polytunnel? Thank you ?
If you have sunny areas with well-draining, fertile soil go ahead and plant them in the ground. Your weather doesn't seem to have any extremes. If you have soil problems, you could go with the pots for your dwarf trees.
https://www.gardeningknowhow.com/edible/fruits/fegen/fruit-tree-spacing-in-gardens.htm
https://www.gardeningknowhow.com/edible/fruits/nectarines/pruning-nectarine-trees.htm
https://www.gardeningknowhow.com/edible/fruits/nectarines/growing-nectarine-fruit-trees.htm
https://www.gardeningknowhow.com/edible/fruits/apricots/pruning-apricot-trees.htm
https://www.gardeningknowhow.com/edible/fruits/apricots/spraying-apricot-trees.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/how-to-grow-a-lemon-tree.htm
Four year old dwarf nectarine tree. Every year, the fruit gets brownish scarring appearance on skin only. Starts right after bud fall and fruit is about the size of a marble, and grows larger as the fruit gets larger. Doesn't seem to hurt the fruit inside. Fresno Calif area. Took to Ag ext and Master gardner. they just wanted the fruit, no help. Hope someone can identify this problem. Thanks Steve R djtopcat@sbcglobal.net
This is the very beginning of brown rot. It is a permanent disease, but can be managed. This articless will help:
https://www.gardeningknowhow.com/edible/fruits/peach/brown-rot-fungus.htm