Blood Sorrel
Rumex sanguineus
Blood Sorrel, or Rumex sanguineus, is a vibrant perennial herb known for its tangy, edible leaves. Native to Europe, it thrives in cooler climates and is cherished for its culinary uses and ornamental beauty.
Everything it needs
9 essentials at a glance
Watering
Blood Sorrel prefers consistently moist soil but should not be waterlogged.
Water the plant thoroughly when the top inch of soil feels dry, typically every 1-2 weeks. During hot summer months, increase frequency as needed. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause wilting and browning leaf edges.
Light
Blood Sorrel thrives in partial shade to full sun, ideally receiving 4-6 hours of sunlight daily.
It can tolerate some direct sunlight but prefers filtered light in hotter climates to prevent leaf scorch. Ideal placement includes a spot that receives morning sun and afternoon shade.
Soil
This plant prefers well-draining, loamy soil with a pH range of 6.0 to 7.0.
A recommended potting mix includes equal parts of compost, peat moss, and perlite to ensure good drainage while retaining moisture.
Humidity
Blood Sorrel enjoys moderate humidity levels around 40-60%.
To increase humidity, consider misting the leaves or placing a humidity tray filled with water and pebbles beneath the pot. Signs of humidity stress include browning leaf tips and curling leaves.
Temperature
The ideal temperature range for Blood Sorrel is between 60-75°F (15-24°C).
It is hardy in USDA zones 3-9 and can tolerate light frost, but prolonged exposure to temperatures below 20°F (-6°C) may damage the plant.
Fertilizing
Use a balanced, water-soluble fertilizer with an NPK ratio of 10-10-10 every 4-6 weeks during the growing season (spring to early fall).
Reduce or stop fertilizing in winter. Signs of nutrient deficiency include yellowing leaves and stunted growth.
Pruning
Prune Blood Sorrel in early spring to remove any dead or damaged leaves and to encourage new growth.
Use clean, sharp scissors or pruning shears for best results. Deadheading is not necessary, but removing spent flower stalks can promote a tidier appearance.
Repotting
Repot Blood Sorrel every 2-3 years or when it becomes root-bound, indicated by roots growing out of the drainage holes.
Choose a pot 1-2 inches larger in diameter. Carefully remove the plant from its pot, loosen the roots, and place it in fresh potting mix, watering thoroughly afterward.
Propagation
Blood Sorrel can be propagated through seed sowing or division.
For seeds, sow them in spring after the last frost, covering lightly with soil. For division, carefully separate clumps in early spring or fall, ensuring each division has roots and foliage. Replant immediately in suitable soil.
When it's unhappy
Yellow leaves
Why it happens
This can be caused by over-watering or nutrient deficiency.
How to fix it
Check soil moisture levels and adjust watering accordingly. If nutrient deficiency is suspected, apply a balanced fertilizer.
Wilting leaves
Why it happens
Wilting can occur due to under-watering or extreme heat.
How to fix it
Ensure the plant is watered adequately and consider providing afternoon shade during hot weather.
Browning leaf tips
Why it happens
This is often a sign of low humidity or over-fertilization.
How to fix it
Increase humidity levels around the plant and reduce fertilizer application.
Root rot
Why it happens
Root rot is caused by overly wet soil and poor drainage.
How to fix it
Allow the soil to dry out and improve drainage. If severe, repot the plant in fresh soil.
Pest infestations (aphids, slugs)
Why it happens
Pests can be attracted to stressed plants or those in poor health.
How to fix it
Inspect regularly and treat infestations with insecticidal soap or neem oil. Maintain plant health to deter pests.
Care through the year
Spring
In spring, focus on removing any dead foliage and fertilizing with a balanced fertilizer to promote new growth. Ensure consistent watering as temperatures rise.
Summer
During summer, monitor for pests and increase watering frequency as the soil may dry out faster. Provide afternoon shade if temperatures exceed 85°F (29°C).
Fall
In fall, reduce watering as the plant enters dormancy. You may also consider harvesting leaves before the first frost for culinary use.
Winter
In winter, keep the plant in a cool location and reduce watering. Avoid fertilizing during this dormant period to prevent root stress.
Toxicity & Safety
Blood Sorrel is considered non-toxic to pets and children. However, excessive consumption may lead to mild digestive upset due to its oxalic acid content. The leaves are the primary edible part.
Good to know
How often should I water my Blood Sorrel?
Water Blood Sorrel when the top inch of soil is dry, typically every 1-2 weeks, adjusting for seasonal temperature changes.
What light conditions are best for Blood Sorrel?
Blood Sorrel thrives in partial shade to full sun, ideally receiving 4-6 hours of sunlight daily for optimal growth.
Can Blood Sorrel be grown indoors?
Yes, Blood Sorrel can be grown indoors as long as it receives adequate light, ideally near a bright window or under grow lights.
Is Blood Sorrel edible?
Yes, Blood Sorrel leaves are edible and have a tangy flavor, often used in salads or as a garnish. However, consume in moderation due to oxalic acid.
When is the best time to propagate Blood Sorrel?
The best time to propagate Blood Sorrel is in early spring or fall, either through seed sowing or division of established clumps.
What type of soil is best for Blood Sorrel?
Blood Sorrel prefers well-draining, loamy soil with a pH of 6.0 to 7.0, which can be achieved using a mix of compost, peat, and perlite.
How can I increase humidity for my Blood Sorrel?
Increase humidity by misting the leaves, using a humidity tray, or placing a humidifier nearby to create a more favorable environment.
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