When is the best time to harvest rhubarb?
Harvest rhubarb stalks when they are between 20-30 cm long and firm, typically from spring to early summer. Avoid harvesting too much in the first year to allow the plant to establish.
Rhubarb (Rheum × hybridum)
Rhubarb (Rheum × hybridum) is a hardy perennial vegetable grown for its tart, edible leaf stalks, prized for pies, jams, and sauces.
Above information is sourced from Wikipedia
Sunlight
Full Sun to Partial Shade
Watering
Consistent Moisture
Soil
Deep, fertile, well-drained loam
Temperature
Cool to Moderate
Habitat
Outdoor
Fertilizer
Moderate
Care Requirements
Light
Full Sun to Partial Shade
Prefers at least six hours of direct sunlight daily for best growth and yield.
Watering
Consistent Moisture
Keep soil evenly moist, especially during dry periods.
Soil
Deep, fertile, well-drained loam
Temperature
Cool to Moderate
Prefers cooler climates and requires a period of winter chill for dormancy and best spring growth.
Habitat
Outdoor
Fertilizer
Moderate
Benefits from annual feeding with compost or organic fertilizer in spring.
Plant Overview
Plant Category
Vegetable
Plant Place Type
Garden, Pot
Plant Environment
Outdoor
Lifespan
Perennial
Plant Height
0.6-2.0 m
Spread
0.6-1.5 m
Growth Rate
Moderate
Dormancy
Yes
Leaf Color
Green
Leaf Type
Lobed
Flower Size
1-5 cm
Optimal Sunlight Lux
60000
Image Gallery
Flowering & Fruiting Cycles
Monthly activity intensity for bloom and fruit across both hemispheres.
Northern hemisphere
Flowering & fruiting calendar
Peak bloom · MayPeak fruit · Jul
FloweringFruiting
Southern hemisphere
Flowering & fruiting calendar
Peak bloom · AugPeak fruit · Sep
FloweringFruiting
Taxonomy
- kingdomPlantae
- divisionTracheophyta
- classMagnoliopsida
- orderCaryophyllales
- familyPolygonaceae
- genusRheum
- speciesRheum × hybridum
Toxicity
Toxic for humans
Yes
Rating: 5/5
Toxic for pets
Yes
Rating: 5/5
Edible
Yes
Leaves and roots are toxic due to high oxalic acid content.
Additional Care Tips
Rhubarb thrives in consistently moist soil. Water deeply and regularly, especially during dry spells, ensuring the soil doesn't completely dry out. Aim for about 2.5 cm of water per week. Mulching around the base helps retain soil moisture and suppress weeds.
Remove any dead, damaged, or diseased stems at any time of year. In late autumn or winter, after the foliage has died back, cut all remaining stems down to ground level. This tidies the plant and removes potential overwintering sites for pests and diseases.
Rhubarb is typically propagated by division of established clumps in early spring or late autumn. Carefully dig up the clump, divide it into sections with at least one bud and a good root system, and replant them immediately in well-prepared soil. Seeds can be sown but may not come true to type.
Rhubarb is a perennial plant that grows best when left undisturbed in the ground for many years. Repotting is generally not necessary for mature plants in garden settings. If starting from divisions or young plants, ensure they are planted in their permanent location with ample space.
FAQs
How do I care for rhubarb plants?
Rhubarb prefers well-drained soil and a sunny to partially shaded location. Water regularly, especially during dry periods, and mulch annually to retain moisture and suppress weeds.
Can rhubarb be grown from seed?
While rhubarb can be grown from seed, it is more commonly propagated by dividing established crowns. Seed-grown plants may not come true to type and take longer to mature.
Why are my rhubarb stalks thin and weak?
Thin or weak stalks can be caused by insufficient sunlight, poor soil fertility, or over-harvesting. Ensure the plant has adequate nutrients, water, and light, and avoid harvesting excessively.
Is rhubarb poisonous?
The leaf stalks of rhubarb are edible and safe to consume. However, the leaves contain high levels of oxalic acid and are poisonous, so they should never be eaten.