Brazilian Jasmine
Mandevilla Sanderi
Mandevilla Sanderi, commonly known as Brazilian Jasmine, is a stunning climbing plant native to South America. Renowned for its vibrant flowers, it adds a tropical touch to gardens and patios, making it a favorite among gardeners.
Everything it needs
9 essentials at a glance
Watering
Mandevilla Sanderi prefers consistently moist soil but should not be waterlogged.
Water when the top inch of soil feels dry, typically every 5-7 days in the growing season and less frequently in winter. Use enough water to saturate the soil, allowing excess to drain out. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause wilting and leaf drop.
Light
This plant thrives in full sun, requiring at least 6-8 hours of direct sunlight daily.
Ideal placement is in a south or west-facing garden or patio. While it can tolerate partial shade, too little light can hinder blooming and growth.
Soil
Mandevilla Sanderi prefers well-draining soil with a pH range of 6.0 to 7.0.
A mix of potting soil, perlite, and compost is ideal to ensure good drainage and nutrient retention. Avoid heavy soils that retain too much moisture.
Humidity
This plant enjoys moderate to high humidity levels, ideally between 40-60%.
To increase humidity, mist the leaves regularly or place a humidifier nearby. Signs of low humidity include browning leaf tips and wilting.
Temperature
Mandevilla Sanderi thrives in temperatures between 65-85°F (18-29°C) and is not frost-tolerant.
It is best suited for USDA hardiness zones 9-11. Protect from extreme heat or cold by bringing indoors during chilly months.
Fertilizing
Use a balanced liquid fertilizer with an NPK ratio of 10-10-10 every 4-6 weeks during the growing season.
Reduce or stop fertilizing in fall and winter. Signs of nutrient deficiency include yellowing leaves and poor growth.
Pruning
Prune Mandevilla Sanderi in late winter or early spring to promote bushier growth and remove any dead or damaged stems.
Use sharp, clean pruning shears. Deadheading spent blooms can encourage more flowers throughout the growing season.
Repotting
Repot every 1-2 years or when the roots outgrow the pot, typically in spring.
Choose a pot 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes and stunted growth. Carefully remove the plant, loosen the roots, and place it in fresh soil.
Propagation
Propagation can be done through stem cuttings, which should be taken in spring or early summer.
Cut a 4-6 inch healthy stem just below a node, remove lower leaves, and place in a pot with moist potting mix. Cover with a plastic bag to maintain humidity until roots develop, which usually takes 3-4 weeks.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or nutrient deficiency.
How to fix it
Check soil moisture and adjust watering schedule. Fertilize with a balanced fertilizer if nutrient deficiency is suspected.
Wilting leaves
Why it happens
Under-watering or low humidity.
How to fix it
Increase watering frequency and mist the plant to raise humidity levels.
Brown leaf tips
Why it happens
Low humidity or too much direct sunlight.
How to fix it
Increase humidity through misting or a humidifier, and ensure the plant is not in direct sun for too long.
Root rot
Why it happens
Excessive moisture and poor drainage.
How to fix it
Allow the soil to dry out, improve drainage, and consider repotting into fresh, well-draining soil.
Pest infestations (e.g., aphids, spider mites)
Why it happens
High humidity and poor air circulation.
How to fix it
Inspect regularly, and treat with insecticidal soap or neem oil if pests are found.
Care through the year
Spring
In spring, repot if necessary and resume regular watering and fertilizing as the plant begins to actively grow. Prune back any dead or damaged stems.
Summer
During summer, ensure the plant receives full sun and adequate moisture. Increase watering frequency as temperatures rise, and deadhead spent blooms regularly.
Fall
In fall, gradually reduce watering as the plant enters dormancy. Move indoors if temperatures drop below 65°F (18°C) and continue to provide bright light.
Winter
In winter, reduce watering further and avoid fertilizing. Keep the plant in a cool, bright location, and monitor for any signs of pests.
Toxicity & Safety
Mandevilla Sanderi is mildly toxic if ingested, particularly the sap and leaves. Symptoms of ingestion may include nausea, vomiting, and diarrhea in pets and children. Keep out of reach of curious pets and kids.
Good to know
How often should I water my Mandevilla Sanderi?
Water your Mandevilla Sanderi when the top inch of soil feels dry, typically every 5-7 days during the growing season. Adjust frequency based on humidity and temperature.
Why are the leaves on my Mandevilla turning yellow?
Yellow leaves can indicate over-watering or a nutrient deficiency. Check the soil moisture and consider fertilizing if needed.
Can Mandevilla Sanderi be grown indoors?
Yes, Mandevilla Sanderi can be grown indoors if it receives adequate sunlight. Place it near a south or west-facing window for best results.
What is the best fertilizer for Mandevilla Sanderi?
A balanced liquid fertilizer with an NPK ratio of 10-10-10 is ideal. Fertilize every 4-6 weeks during the growing season for optimal growth.
How do I propagate Mandevilla Sanderi?
Propagation is best done through stem cuttings in spring or early summer. Cut a healthy stem, place it in moist potting mix, and cover to maintain humidity until roots develop.
What should I do if my Mandevilla is not blooming?
If your Mandevilla is not blooming, it may not be getting enough sunlight or nutrients. Ensure it receives at least 6-8 hours of sunlight and consider fertilizing.
Is Mandevilla Sanderi toxic to pets?
Yes, Mandevilla Sanderi is mildly toxic to pets, particularly the sap and leaves. Keep it out of reach of pets and children to avoid ingestion.
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