Vegetable
Malabar Spinach
Basella alba · Basellaceae
Also called: Ceylon spinach, Vine spinach, Indian spinach, Red-stem Malabar spinach ('Rubra'), Pui shak
Malabar Spinach (Basella alba) is a moderate-water vegetable well suited to Tucson and the low desert. It's a fast-growing vegetable.
Malabar Spinach at a glance
- Water use
- Moderate (established)
- Sun
- Full sun for fastest growth; tolerates and appreciates a bit of afternoon shade in extreme Tucson heat, which also reduces bolting.
- Mature size
- Climbing vine commonly 6-10 ft (can reach 10-12 ft in a long hot summer) on a trellis.
- Growth rate
- Fast
- Bloom
- White to pinkish (green-stem form); 'Rubra' has reddish-purple stems and pink-tinged flowers, Late summer into fall; tiny berries follow (staining purple juice).
- Cold hardiness
- Tender tropical (hardy only to ~zone 10); frost-sensitive and grown as a warm-season annual in Tucson. Killed by winter frost; loves the heat that makes true spinach fail.
- Soil
- Fertile, moist but well-drained soil rich in organic matter; pH around 6.5-6.8.
- Native range
- Tropical Asia (Indian subcontinent / Southeast Asia)
- Best used as
- Heat-tolerant summer leafy green (cooked like spinach or young in salads), Edible trellis/ornamental vine ('Rubra' is decorative), Vertical garden plant, Natural purple dye from berries
- Wildlife
- Flowers offer minor pollinator value; birds may eat the berries.
- Toxicity
- Edible leaves and stems (cooked or young raw); not toxic. High in oxalates, so those prone to kidney stones should eat in moderation. The purple berry juice stains. Not toxic to pets.
How to grow Malabar Spinach in Tucson & the low desert
Watering
Hot-season vine for the low desert: start seed indoors Jan-March or direct-sow/transplant March through May once soil is warm; it thrives in 70-95 F and ramps up above 90 F, cropping all summer including monsoon. Needs consistent moisture - never let it dry out or it bolts and flavor turns bitter; water deeply, often daily in 100 F+ heatwaves. Mulch heavily to keep roots cool and moist.
Fertilizer & nutrients
Likes fertile soil. Amend with compost and side-dress with a balanced or nitrogen-leaning fertilizer (or fish emulsion) every few weeks to keep the thick succulent leaves coming. Steady nitrogen supports continuous leaf harvest.
Pruning & care
Trellis the climbing vines (6-8 ft). Harvest by pinching young leaves and tips, which keeps the plant productive and bushy. Pinch flower spikes to prolong tender leaf production.
Notes
The premier summer 'spinach' substitute for Tucson - it produces lush greens through July and August when true spinach is impossible. It is NOT a true spinach (different family). Keep it watered to avoid bitterness and bolting.
Sources: Growing in the Garden - How to Grow Malabar Spinach (Arizona low desert); University of Wisconsin-Madison Horticulture Extension (Basella alba); Pima County Master Gardeners / low-desert warm-season greens guidance