Euphorbia resinifera — an easy houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Euphorbia resinifera

Euphorbia Resinifera

Updated · 234 observations
ON THIS PLANT

Euphorbia resinifera, the resin spurge, is a species of spurge native to Morocco, where it occurs on the slopes of the Atlas Mountains. The dried latex of the plant was used in ancient medicine. It contains resiniferatoxin, a capsaicin analog tested as an analgesic since 1997.

A note from PlantMom

Resin spurge has moderate disease resistance but is more sensitive to humidity and overwatering. It is also more prone to illness when it receives inadequate light and is overwatered. Regarding care, resin spurge is drought-tolerant and can endure long periods without watering. It needs little fertilizer and only occasional pruning. This makes it suitable for people of any experience level, especially those who prefer to spend less time on plant care and who may occasionally be away from home for extended periods. It is a good option for people who do not want to invest a lot of time in maintenance but still want an easy-to-care-for plant.

— PlantMom
CARE GUIDE

How to keep Euphorbia Resinifera.

Light

The resin spurge grows best with plenty of sunlight in its natural environment. It can also tolerate moderate sun exposure. However, too little or too much sun may impair its growth and health, possibly causing its leaves to become pale and wilt.

Water

Resin spurge is well-suited for arid climates due to its high drought tolerance. It requires very little water, needing to be watered only about once every three weeks, and prefers dry soil conditions. This plant is ideal for outdoor environments and xeriscaping because of its resilience and preference for full sunlight.

Humidity

This plant prefers dry conditions, so don't mist it. However, watering it less often can also thrive in higher humidity.

Temperature

Resin spurge occurs naturally in regions where temperatures range from 68 to 100 °F (20 to 38 ℃). These plants prefer warm conditions and may require extra protection during severe winters. Alter light exposure to control temperature across different seasons.

Fertilizer

For Resin spurge, apply small amounts of fertilizer once or twice a year during the growing season. Do not fertilize in winter or in summer when the plant is dormant. Reduce feeding for repotted plants and wait a couple of months after repotting before you fertilize. Fertilizing supports healthy growth and encourages flowering.

Pot & Repot

To repot resin spurge, do so every 2 to 3 years in early spring, moving it to a slightly larger pot with good drainage. After repotting, place the plant in bright, indirect light for about a week to help it recover. Handle the plant gently to maintain its health and vigor.

CHARACTERISTICS

Botanical profile.

Plant Type
Succulent
Life Cycle
Perennial
Genus
Euphorbia
Family
Euphorbiaceae
Hardiness Zone
9-11
Mature Height
30 cm
Mature Spread
49 cm
Leaf Color
Light Green
Leaf Type
Evergreen
Flower Color
Yellow
Flower Size
2.54 cm
Bloom Time
Late spring, Early summer, Mid summer
Planting Time
Summer, Autumn
Harvest Time
Mid summer
Native Area
Morocco
ALSO KNOWN AS

Other names.

en African spurge en Resin spurge
FREQUENTLY ASKED

Reader questions.

What should I do if I give too much or too little water to my Resin spurge?

Resin spurge, like other succulents, can survive without water for long periods of time. However, if you forget to water your Resin spurge for a month or more, it will show signs of thirst and damage. The symptoms of underwatering include a lacklustre and wrinkled appearance, dried up and brown leaves, and completely dried out soil. To revive your underwatered Resin spurge, submerge the pot in water for 5-10 minutes until the soil feels moist on the surface. Overwatering is dangerous for Resin spurge and can lead to root rot. Root rot occurs when fungi and bacteria thrive in wet soil and feed on the roots, preventing them from absorbing nutrients and water. Signs of overwatering include yellow, swollen, and translucent organs that may burst open, browning or blackening of the plant, and leaves falling off easily. Check the soil to confirm if overwatering is the issue. To address overwatering, improve air ventilation and adjust the watering frequency. Saving an overwatered Resin spurge is possible if caught early. Remove the plant from its pot, clean the roots in room-temperature water to remove any fungus, and check their health. If the majority of roots are affected by root rot, it may be difficult to save the plant. In this case, remove healthy stems to propagate a new Resin spurge. If only a portion of the roots are affected, remove unhealthy roots using a sterilized cutting tool. Dip the remaining healthy roots in a fungicide and repot the plant in fresh, well-draining soil. Although not guaranteed, the Resin spurge has a good chance of recovering and producing new growth in the next growing season.

Why is it important to fertilize my Resin spurge?

Applying plant food to Resin spurge during the growing season helps support healthy growth by adding nutrients to the growing medium. While Resin spurge does store water and nutrients, fertilizing can further enhance its growth and even encourage mature specimens to produce blooms.

What are the sunlight requirements for Resin Spurge?

Resin spurge requires full sun, which is above 6 hours of sunlight daily, to thrive best. It can also tolerate partial sun, about 3-6 hours of sunlight. Observing how sunlight moves through your garden will help you choose the ideal spots that offer a balance of light and shade, ensuring your plants' health and happiness. It's important to provide the resin spurge with ample solar exposure to interact with its natural environment, though it can manage in moderate sun conditions. Inadequate or excessive sun could negatively affect its growth, possibly resulting in pale-colored and wilted leaves.

What is the ideal climate for growing Resin spurge?

Resin spurge thrives in warm environments, ideally in climates where temperatures fluctuate between 68 to 100 °F (20 to 38 °C). It favors conditions where it can receive ample sunlight, particularly during seasons when the temperature varies. To ensure its health during harsh winters or cooler temperatures below 20°C, it's advisable to move the plant indoors, preferably near a south-facing window for maximum sunlight exposure. In cases where natural light is insufficient, supplemental lighting can be utilized to maintain the plant’s growth. Additionally, during colder months when the temperature drops below 0°C, outdoor plants should be moved inside or protected using insulation methods like temporary greenhouses, plastic film, or fabric wraps to prevent root rot and wilting.

How often do I need to water my Resin spurge plant?

To determine how often to water Resin spurge, there is no exact rule. The best way is to check the soil and only water when it is completely dry. You can check the soil by either sticking your finger in the pot or using a moisture meter. If you have planted it in a deep pot, you can check with a stick or chopstick. If the soil feels even slightly moist, wait a few days and check again. In general, most people will need to water Resin spurge every two weeks in summer and once a month in winter. However, there are several factors that can affect the frequency of watering. For more specific guidance, please refer to the considerations listed below.

When should I fertilize my Resin spurge?

Resin spurge, unlike other plants, only requires a small amount of fertilizer during its active growth period. It should be fertilized 1-2 times a year, specifically in the spring and autumn. Avoid fertilizing during the winter and summer when the plant is dormant. If you recently repotted your Resin spurge, be cautious with the amount of fertilizer you use. It is recommended to wait a few months after repotting before applying any fertilizer.

How can artificial lighting be used for indoor Resin Spurge plants?

Indoor Resin Spurge plants require adequate lighting for optimal growth, especially in conditions where natural sunlight is insufficient, such as winter or less sunny spaces. Artificial lights, particularly LED lights which can be customized to provide specific light wavelengths, are a crucial solution. The requirements are 30-50W/sq ft for full sun plants, 20-30W/sq ft for partial sun plants, and 10-20W/sq ft for full shade plants. The light source should be placed 12-36 inches above the plant to mimic natural sunlight. To ensure healthy growth, most plants need 8-12 hours of artificial light per day.

How should you care for Resin spurge during low temperature conditions?

During low temperature conditions, particularly when the temperature falls below 20°C, Resin spurge requires careful monitoring as it is not tolerant of cold weather. It performs best in high temperatures and should be kept above 0°C during winter to avoid the risks associated with freezing. Exposure to temperatures below -5°C can make the plant weak, cause wilting, and make it prone to root rot. In the event of mild frost damage, symptoms might not be immediately visible, but the plant could gradually wither. To mitigate these effects, it is recommended to trim off frostbitten areas and check for root rot. If root rot is detected, the affected roots should be removed, and the plant may need to be propagated through cuttings. Moving the plant to a warm indoor environment and placing it near a south-facing window can help ensure it receives enough sunlight. Supplemental lighting can also be considered if natural light is not sufficient.

What do I need to think about when watering my Resin spurge?

Watering your Resin spurge depends on various environmental factors such as container size, soil type, temperature, and humidity. To determine watering frequency and amount, choose a container with good drainage and consider that a small container will hold less moisture, while a larger one will stay wet longer. Avoid using an oversized pot, as this can lead to overwatering. When repotting, move to a container only one size larger. Use a shallow container as Resin spurge has shallow roots. In terms of season, water Resin spurge less often during winter when growth slows down and water loss through evaporation is reduced. The soil retains moisture longer during cooler months. Additionally, consider the climate of your location. Humid and rainy areas require less watering compared to dry, arid climates. Keep in mind that conditions can vary with seasons and indoor heating or air conditioning. If you have Resin spurge planted in the ground, it typically won't need extra watering once the root system is established. However, during extended dry periods, occasional watering may be necessary. For those growing Resin spurge in containers, you can move the plant outside in suitable spring and summer temperatures, but remember that it may require more water due to increased sun exposure, even if placed on a shaded porch.

When is it best to not use fertilizer for my Resin spurge?

Resin spurge, like other plants, goes through a dormancy period. This is the time when you should avoid using fertilizer. During both the summer and winter, the plant stops growing, so it's wise to refrain from applying fertilizer. It's also recommended to stop fertilizing for the first few months after repotting in the spring.

What are the symptoms of insufficient or excessive sunlight exposure in Resin Spurge?

In suboptimal lighting, Resin Spurge may exhibit symptoms such as smaller new leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, and lighter-colored new leaves which indicate a deficiency. Excessive sunlight can cause chlorosis (leaves turning yellow), sunscald (damaged leaves or stems from intense light), leaf curling, wilting, and leaf scorching, showcasing the importance of balanced sunlight exposure.

What steps should be taken if Resin spurge experiences high temperatures?

Resin spurge should be kept in conditions below 38°C, especially during the summer months, to prevent growth cessation and water loss. When temperatures soar above 43°C, the plant is at risk of wilting and becoming susceptible to sunburn. In such scenarios, it's crucial to first remove sunburned and rotten parts of the plant. To aid recovery, the plant should be shielded from the direct afternoon sunlight until it shows signs of recovery and resumes growth. If the plant suffers from root rot due to overwatering or excessive heat, it is imperative to cease watering until new root growth is observed, ensuring the health and sustainability of Resin spurge under high-temperature stress.

PLATES
Euphorbia resinifera leaf
PLATE 01 · leaf
Euphorbia resinifera leaf
PLATE 02 · leaf
Euphorbia resinifera flower
PLATE 03 · flower
Euphorbia resinifera flower
PLATE 04 · flower
Euphorbia resinifera bark
PLATE 05 · bark
Euphorbia resinifera bark
PLATE 06 · bark
ALSO IN THE LIBRARY

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