Vegetable
Snap pea / Snow pea
Pisum sativum · Fabaceae
Also called: Garden pea, English pea, sugar snap pea, Chinese pea (snow pea)
Snap pea / Snow pea (Pisum sativum) is a moderate-water vegetable well suited to Tucson and the low desert. It thrives in full sun, with a moderate growth rate. Expect white (some varieties pink/purple) blooms Cool-season bloom.
Snap pea / Snow pea at a glance
- Water use
- Moderate (established)
- Sun
- Full sun (6+ hours) in the cool season; light afternoon shade helps protect late spring plantings from early heat.
- Mature size
- Bush types 2-3 ft; vining/climbing types 4-6+ ft on a trellis.
- Growth rate
- Moderate
- Bloom
- White (some varieties pink/purple), Cool-season bloom (winter into spring in Tucson); pods follow, with harvest beginning roughly 55-70 days from sowing.
- Cold hardiness
- Cool-season and frost-tolerant (young plants take light frost); flowers and pods can be damaged by hard freezes. Heat above ~85 F stops flowering and ends the crop, so they must mature before Tucson's spring heat.
- Soil
- Well-drained loam with compost; tolerates Tucson's alkaline soils. As a legume, peas fix nitrogen with Rhizobium bacteria - inoculating seed can help in soils where peas haven't grown before.
- Native range
- Mediterranean and Near East / western Asia; not native to the Sonoran Desert.
- Best used as
- Cool-season edible-pod or shelling vegetable, vertical/trellis gardening, raised beds and containers, nitrogen-fixing cover/rotation crop
- Wildlife
- Flowers attract bees; seeds/seedlings may be browsed by birds and rabbits.
- Toxicity
- Edible pods/peas are non-toxic. Note: ornamental sweet pea (Lathyrus) is a different, toxic plant - true garden peas (Pisum) are safe to eat.
How to grow Snap pea / Snow pea in Tucson & the low desert
Watering
Keep soil evenly moist, especially during flowering and pod fill; in Tucson's dry cool-season air water deeply about every 2-3 days. Avoid waterlogged soil, which rots seed and roots.
Fertilizer & nutrients
Low nitrogen needs because they fix their own; provide phosphorus and potassium and a modest amount of compost. Excess nitrogen produces vines at the expense of pods.
Pruning & care
No true pruning; provide a trellis or netting for vining/climbing types (bush types are more self-supporting). Pinch nothing - just harvest pods regularly to keep plants productive.
Notes
In Tucson sow seed in the cool season: fall (Oct-Nov) for a winter/early-spring crop and again in late winter (Jan-Feb). Direct-sow against a trellis; they don't transplant well. Time plantings so pods mature before sustained spring heat shuts them down. Snow peas are eaten as flat immature pods; snap peas as plump edible-pod types.
Sources: University of Arizona Cooperative Extension (Pima County) low-desert planting calendar; Pima County Master Gardeners; Arizona Master Gardener Manual