Tasteless vegetables, by the way, are not the result of what's spread with a muck-spreader or of other fertilizers and chemicals. They are the result of developing strains for the mass market. Left to itself, a pea plant isn't 'stupid' enough to produce peas at exactly the same time as every other pea plant. But the producers want exactly that, so that the crop can be gathered at one go, often in one night, predictable to a very short time-frame. Similar considerations relate to other crops, including such factors as consistent size, colour, big yield etc. The flavour may be one thing which gets lost in all this, and often is.
What you may grow in your garden is not affected by these commercial considerations and is often an old variety. That has survived because it was developed precisely for flavour.You are not concerned much about yield, size, shape or picking the whole crop in a few hours!
Tasteless apples are a particularly bad example of commerce. Happily, peas aren't much affected in flavour; frozen peas compare well with 'garden' varieties in that; but, in general, the commercial products are not as good as garden ones.