Seeds Lathyrus odoratus Barry Dare. Bright red blooms on long stems are perfect for cutting on this prize winning sweet pea. Lathyrus odoratus in this color grouping tend to be less fragrant on the whole. Plant as early as your zone allows for best results, and provide rich soil and support for climbing tendrils. Grows to 4 ft tall, and blooms all summer. Reseeds. Zones 4 to 10