Mottled Spurge
Euphorbia lactea
Euphorbia lactea, commonly known as Mottled Spurge, is a striking succulent native to tropical regions. Its unique mottled appearance and easy care make it a popular choice for indoor gardeners.
Everything it needs
9 essentials at a glance
Watering
Euphorbia lactea prefers to dry out between waterings.
Water thoroughly when the top 1-2 inches of soil are dry, typically every 2-3 weeks in the growing season and less frequently in winter. Signs of over-watering include yellowing leaves and mushy stems, while under-watering may cause the plant to shrivel and lose its vibrant color.
Light
This plant thrives in bright, indirect light but can tolerate some direct sunlight.
Ideally, it should receive 6-8 hours of light daily. Too much direct sun can scorch the leaves, while too little light may lead to leggy growth.
Soil
Euphorbia lactea prefers a well-draining soil mix, ideally a cactus or succulent potting mix with a pH range of 6.0 to 7.0.
Ensure the pot has drainage holes to prevent water accumulation, which can lead to root rot.
Humidity
This plant prefers average household humidity levels but can tolerate lower humidity.
To increase humidity, mist the plant occasionally or place it on a pebble tray with water. Signs of humidity stress include browning leaf tips and wilting.
Temperature
Euphorbia lactea thrives in temperatures between 65-80°F (18-27°C) and is hardy in zones 10-11.
It cannot tolerate frost and should be protected from temperatures below 50°F (10°C).
Fertilizing
Use a balanced liquid fertilizer with an NPK ratio of 10-10-10 during the growing season, every 4-6 weeks.
Reduce or stop fertilizing in the fall and winter. Signs of nutrient deficiency include stunted growth and pale leaves.
Pruning
Prune Euphorbia lactea in spring to maintain its shape and remove any dead or damaged stems.
Use clean, sharp pruning shears and wear gloves, as the sap can be irritating. Deadheading is not necessary for this plant.
Repotting
Repot every 2-3 years or when the plant outgrows its pot.
Choose a pot that is 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes or stunted growth. Carefully remove the plant from its pot, trim any damaged roots, and place it in fresh soil.
Propagation
Propagation can be done through stem cuttings.
Take a healthy cutting of about 4-6 inches, allow it to callous for a few days, then plant it in a well-draining soil mix. Best timing for propagation is in spring or early summer when the plant is actively growing.
When it's unhappy
Yellowing leaves
Why it happens
Over-watering or poor drainage
How to fix it
Reduce watering frequency and ensure the pot has adequate drainage.
Shriveling stems
Why it happens
Under-watering or low humidity
How to fix it
Increase watering frequency and consider misting or using a pebble tray for humidity.
Leaf drop
Why it happens
Sudden temperature changes or stress
How to fix it
Maintain consistent temperatures and avoid placing the plant near drafts or heat sources.
Brown leaf tips
Why it happens
Low humidity or over-fertilization
How to fix it
Increase humidity and reduce fertilizer application.
Root rot
Why it happens
Excess moisture in the soil
How to fix it
Allow the soil to dry out completely and repot in fresh, dry soil if necessary.
Care through the year
Spring
In spring, increase watering as the plant begins to actively grow. Consider repotting if it has outgrown its container.
Summer
During summer, ensure the plant receives plenty of bright light and monitor for signs of over-watering as temperatures rise.
Fall
In fall, gradually reduce watering as the plant's growth slows down. Stop fertilizing to allow the plant to prepare for dormancy.
Winter
In winter, keep the plant in a warm location and reduce watering significantly, allowing the soil to dry out completely between waterings.
Toxicity & Safety
Euphorbia lactea is toxic to pets (cats and dogs) and humans. The sap can cause skin irritation and ingestion can lead to nausea, vomiting, and diarrhea. Keep it out of reach of children and pets.
Good to know
How often should I water my Euphorbia lactea?
Water your Euphorbia lactea every 2-3 weeks, allowing the top 1-2 inches of soil to dry out completely before watering again.
Why are my Euphorbia lactea leaves turning yellow?
Yellowing leaves are often a sign of over-watering or poor drainage. Ensure you are not watering too frequently and that the pot has drainage holes.
Can Euphorbia lactea tolerate direct sunlight?
Yes, Euphorbia lactea can tolerate some direct sunlight, but it prefers bright, indirect light to prevent leaf scorch.
What is the best soil for Euphorbia lactea?
A well-draining cactus or succulent potting mix with a pH range of 6.0 to 7.0 is ideal for Euphorbia lactea.
How do I propagate Euphorbia lactea?
Propagate Euphorbia lactea through stem cuttings. Allow the cut end to callous for a few days before planting it in well-draining soil.
What temperature does Euphorbia lactea prefer?
Euphorbia lactea thrives in temperatures between 65-80°F (18-27°C) and should be protected from temperatures below 50°F (10°C).
Is Euphorbia lactea toxic to pets?
Yes, Euphorbia lactea is toxic to pets and humans. The sap can cause skin irritation, and ingestion can lead to nausea and vomiting.
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