Home Gardening Fragrant sweet peas are the mainstay of many cottage gardens. These climbing flowers come in a wide variety of colors and many have intense perfumes. Theyre annuals that prefer full sun, although they dislike hot weather and produce their best blooms in early spring. If you live in a hot climate, sow the seeds in fall. Sweet peas are usually trellised, but in a cottage garden, you can allow them to weave around shrubs and tall perennials or train them on a fence.