Family: Leguminaceae
Scientific Name: Lathyrus odoratus 
Common Name: Sweet Pea
Description:
An heirloom vine that is still popular in the modern garden.
Pronunciation:
(la-THI-rus)(o-do-RA-tus)
plant type:
Annuals
Hardiness zone:
Sunlight:
full
Moisture:
moist, hate to be dried out
Soil & Site:
prefers deep rich organic well drained soils, tolerates average
Media:
Temperature:
will tolerate light frosts, often listed as a hardy annual
Flowers:
many colors, blooms best in cooler weather, will shut down in the heat of the summer, fragrant
Foliage:
alternate, pinnate with two leaflets and a clinging terminal tendril, winged stems
Dimensions:
2 to 10 feet depending on the variety
Maintenance:
some varieties may need staking
Propagation:
can be sow in situ, sow indoors a few weeks before the last frost, sow in peat pots to avoid root disturbance, soak seeds for 2-3 days before sowing,germinate a lower temps than most seeds 55-60 degrees F, plant out early May in zone #5
Origin & History:
In 1870 a Scottish nurseryman, Harry Eckford, crossbred the original flower, creating the ornamental and sweetly scented sweet pea we know today. Laythyrus is the Greek name for Pea.
Notes & Reference:
Even though the word Pea is in the name the seeds and flower of this plant are toxic. (Reference:#40-Herbaceous Ornamental Plants (Steven Stills), #109-Annuals and Tender Perennials for North American Gardens (Wayne Winterroud)
Photos: