I don't think petite is a height so much as a body shape. I have seen tall women shopping in the petite section because they have a short waist or shorter arms or wanted a skirt that fits them better than the regular ones, and I have seen smaller women shopping in the junior/misses/womens section for similar reasons.
Sweet clover needs a high pH, 6.0 or higher, for proper nodulation to occur, and it has a higher calcium requirement as well. Sweet clover is able to obtain phosphorus from relatively unavailable soil phosphates and will grow on soils where alfalfa, red clover or ladino will fail.
Red clover is well adapted to sowing on a prepared seedbed, either in the early spring or late summer (Aug. 15 to Sept. 14). The seedbed should be firm, and the clover seed should not be covered with more than 1/4 to 1/2 inch of soil. Fertility treatments are best recommended on the basis of a soil test.