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All my plants leaves in my garden are turning white in my garden even though we've had no frost.?

Can anyone tell my why it's happened to my buxus,cypress,japanese maple and my ivy what's going on they've only been planted out for two weeks,but they were well established and have been doing well up to 1 day ago.

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1. If you didn't condition them gradually to the sun, and they are in full or near full sun now they may be getting sun burned. Try shading them till their color comes back and then gradually exposing them to sun a little each day till they get used to it.
2. This could either by an infection, in which case a detailed examination of the leaves should reveal more, or is the result of some stress caused to the plants, which is unusual for such a mixture of species to be affected in the same way. The first common culprit for white leaves is a fungal infection, such as powdery mildew, which shows as a white form on leaves. It may seem like a coating, or just that the leaves are white. This frequently starts in spring, when there is white humid weather, and temperatures have risen - you won't typically see it in winter time. http://www.butterflyrevolt.com/images/2009/04/powdery-mildew.jpg http://www.neilsperry.com/siteimages/Image/Articles/May2009_egardens/Powdery_Mildew_l.jpg http://ipmnet.org/plant-disease/plant_images/pmNorwayCrimsonSentryweb.jpg http://i.telegraph.co.uk/telegraph/multimedia/archive/01453/mildew2_1453687c.jpg Otherwise, this could be the result of stresses, such as very bright sunlight, coupled with water logging etc. To treat powdery mildew, you can use preventative measures, as well as chemical controls. Spraying with baking powder or milk can help, but is better before a major outbreak. Sulfur can also be put on to the plants, as this is broadly anti-fungal, and is usually sold as a powder to puff onto the plants. You can use a fungicide, which kills on contact, or else a 'systemic' fungicide, which enters the plants and remains there for several weeks/days, and is able to prevent the fungus wherever it crops up on the plant. I'd recommend getting a systemic fungicide and treating your plants, if you have powdery mildew. Fungal spores are present all of the time, and just need the right conditions before they take hold and multiply. The earlier they are attacked the better, as it contains their potential spread. Increasing fresh air movement around plants can help, but the weather temperatures and humidity are the chief mechanisms that encourage it to flourish. Hope this helps. Good luck! Rob