
Heather
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on July 15, 2012
Peas can turn yellow for a number of reasons. Some possibilities include too little water, nitrogen burn from the manure (though you would have seen that sooner, I think), root rot and high temps.
As long as the containers are draining well, I would try increasing water to the plants - this will help if it if it is too little water or high temps.
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