Sweet Pea, Fragrant Mix Item Number: FSW-8890 Detailed Description Flowers , Sweet Pea, Lathyrus spp. Annual vines love cool spring weather and produce lots of bonnet-shaped flowers in shades of pink, red, maroon, lavender, deep lilac, mid-blue, pure white. Just a few stems will fill a room with their wonderful old-fashioned scent. Vigorous vines climb banks, poles, and screens. Plant outdoors 6 weeks before last frost in rich well-drained soil, keep moist, pinch once when 8" tall to encourage branching.