Peas are a great sweet treat from the garden and grow the best when the weather is cool.  The best months for transplanting peas into your garden are late-August through late-March.  For optimum yields, all peas should be given a supporting structure to climb up on.  Peas want to be planted in a bright sunny location, however, if you are planting peas late in the recommended window, allow for some shade from the mid-day sun, this will extend their harvest and keep the peas sweet.  Before transplanting, prepare your garden soil by adding compost, landscape mix and worm castings.  If planting peas in a row, add in two handfuls of compost, and one each of landscape mix and compost for every two feet of row.