Answer: The traditional sweetpea or Lathyrus odoratus is an annual flowering vine, and is usually grown from seed planted in the ground where the plant is to grow. The seed should be soaked in water for about eight hours immediately prior to planting and the planting should be done in very early spring, as soon as the soil can be worked, while the weather and soil are still cool. This plant grows best in cool weather and will usually quit blooming and likely die when the summer heat arrives. In your area, it is certainly not too early to plant them in late February/early March! Seed is widely available at local retail nurseries and from mail order suppliers such as Burpee.
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