Hi Plantmark,
What was the ratio of fresh to well rotted manure. Fresh Horse manure like you used is detrimental to most plants.
There is much written on this subject, mostly very scientific but, to be simplistic, fresh manure takes more from the soil then it adds to it and hence your radishes are doing poorly.
If, as I believe your inferring, your planning on growing Toms in the same spot I personally would dig the lot out and start again. You can continue the composting process with what you’ve dug out.
Don.
