Wading in deeper
Replicating the Tropics
Plants from the Anacardiaceae family thrive outdoors in USDA Hardiness Zones 9-11. Inside your house, the air is likely too dry, especially during winter when central heating is active. You want to aim for 50-60% ambient humidity around the foliage.
Using a localized humidifier is vastly superior to misting, which only raises humidity for a few minutes and can encourage fungal diseases on the leaves.
Feeding for growth
In the restricted environment of a pot, your tree relies entirely on you for nutrition. During the active growing season (spring through summer), a balanced NPK (Nitrogen-Phosphorus-Potassium) fertilizer is vital.
Nitrogen encourages leafy green growth. Once the tree is mature enough to flower, a shift to a phosphorus-heavy blend helps set the blooms. Always dilute liquid fertilizers to half-strength to prevent root burn.
Defending the canopy
Indoor plants lack natural predators to keep pest populations in check. Spider mites love dry, warm indoor air, while mealybugs hide in the crevices of new growth. Keep a bottle of cold-pressed neem oil handy. A monthly wipe-down of the leaves acts as a fantastic preventative measure.
