Planting & Growing:Sow seeds in full sun in cool early spring weather (as early as the ground can be worked). In mild winter climates, where the ground does not freeze, sweet peas can be planted in the fall. Erect a well-anchored trellis, fence, or vertical netting for these climbing vines before planting seeds. Seedlings will form strong root systems, then overwinter to bloom vigorously in the spring. Plant seeds 1 deep and 2 – 3 apart. When seedlings are 2 tall, thin to 4 – 5 apart to allow plants room to mature.
Sweet peas bloom best before the weather gets too hot. Where summer heat comes on fast, they ll appreciate a spot with afternoon shade. Anchor supports well as vies will grow heavy with bloom. Protect seedlings from birds, slugs, and snails. Mulch and keep well-watered. For longest bloom, pick flowers often and keep faded blossoms cut.