Q.what is the best feed for peas, beans, & corgettes
I wish to know what is the best feed to put on my vegetable and flowers

Certified GKH Gardening Expert
Since two of the three of those crops produce their own nitrogen, it will only be necessary to add a bloom formula with no nitrogen at all. Raw potassium phosphate is fine, although, you will want to add trace minerals as well.
I usually don't recommend any particular brand or items, but in this case I will. Foxfarm makes a nutrient line of bloom boosters. You will only need one of these. It is called BeastieBloomz. This is a super concentrated phosphorous and potassium blend with no nitrogen.
You will want to use this at 1/4 strength that it recommends on the packaging. The results will speak for themselves.
Again, I usually wouldn't recommend this, but in your situation, you must be careful how you feed this arrangement, so I felt that the answer was warranted.