Mealybugs, red spider mites, and glasshouse whitefly are listed indoor or under-glass pests. Low temperatures or other unmet conditions can lead to leaf drop or failure to flower.
How to care for a mandevilla
Use bright indirect light for mandevilla indoors. Reserve full sun for an outdoor container.
Plant coveredMandevilla sanderiMandevilla · Indoor and outdoor care
Find a bright, steady position
Light and temperature
Bright indirect light is the supported indoor placement. Full-sun flowering guidance belongs to the named outdoor cultivar context, not automatically to an indoor plant.
Warm, humid conditions are required. RHS advises above 21°C in spring and summer and above 15°C in winter, with humid air or damp gravel.
Check the mix, drainage and pot
Watering, drainage and repotting
Water regularly from spring through autumn, keeping the medium from becoming waterlogged. Reduce watering in winter without letting the root ball become bone dry.
Use peat-free loam-based John Innes No. 3 compost with added grit. Repot in late winter or early spring when roots are crowded, using only a slightly larger pot.
Feed only during active growth
Fertilizer and active growth
Use a general-purpose liquid fertilizer monthly from spring to autumn. RHS also suggests a potassium-rich feed in summer for flowering. Concentration is not specified.
Check the visible signs before changing care
Common problems
Use the verdict for this exact plant
Pet safety
Sources
- Royal Horticultural SocietyIndoor light; temperature; humidity; watering; feeding; compost; repotting; pests
- North Carolina State University Extension Gardener Plant ToolboxIndoor bright indirect light; room temperature; humidity; moisture; drainage; cold sensitivity
- University of Florida IFAS ExtensionCultivar identity; full sun; watering; fertilizing; pests; cold sensitivity; sap
Pet-safety information for catalog plants uses ASPCA reference data where available. It is reference information, not veterinary advice.