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By Terrna

United Kingdom Gb

During the last 3 days, since the weather has warmed up, I have put my Alicante Tomato plants outside to harden off. This morning I noticed that the leaves on two of them are turning white. Does this mean the sun has been too strong for them or is it something else? Last year they were out all through the summer and this never happened



Could be sunburn, but if you've left them out overnight, the other cause of white patches is cold temperatures.

15 May, 2014


There have been some cold nights, I would put them in at night until the end of the month.
what seems to suit them is stable temperatures not high/low peaks and troughs

15 May, 2014


It could be caused by stress to the plant due to a sudden change in its environment, i.e. a drastic change in temperature, especially cold nights, a lot more sunlight suddenly getting to them or a sudden change in how much water they get.

The other thing that can cause this problem is if you get water on the leaves. The water droplets act like a magnifying glass that causes the leaves to burn, but this usually shows up as white spots.

I'm sure that once they get used to their new position they will overcome this stress. The damaged leaves will fall off and new laves will grow in their place. When they reach 5 - 6 feet tall and get to adulthood they will be fine and produce lovely fruits. :o)

15 May, 2014


Thank you all very much for your kind replies. I have decided to bring the plants in at night for the time being although they had only been out for two nights both of which were very mild. Hope I've caught them before it's too late.

16 May, 2014

How do I say thanks?

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