How do I grow tomato plants successfully?
I’ve grown tomato plant in a boxed garden and every year they are getting diseased every year. The leafs turn yellow and fall off.
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Hello Sharon! There are a few different reasons why your tomato plants may be turning yellow. Lack of water, your soil lacks enough nutrients, lack of sunlight to lower leaves, a disease like blight. Here's some information for you. Maybe your will find the answer you need: https://pallensmith.com/2015/04/23/nine-common-tomato-problems/
NOT ENOUGH DRAINAGE OR LACK OF NITROGEN IN TH E SOIL .PREP THE SOIL EACH TEAR OR REPLACE IT
Crop rotation is important. Since you can't change the location, the soil needs to be replaced every year, or at least heavily amended. Here are some sites to help you out.
https://savvygardening.com/5-tips-for-growing-tomatoes-in-raised-beds/
http://www.tomatodirt.com/tomatoes-in-raised-beds.html
https://greenvalleysupply.com/blogs/the-dirt/growing-tomatoes