Sunlight

Like all citruses, pomelo needs full sunlight and good air circulation to grow large and quality fruits. Do not keep the plant in a shaded spot as it will result in leggy growth with smaller or no fruits.

Make sure it gets a minimum of 6-7 hours of bright sun every day. Follow the simple rule— the more sunlight it gets, the better it will be.

Soil

Amend the soil with plenty of organic matter and compost. This plant needs a well-draining and loose growing medium to grow best. A slightly acidic pH (5-6) is optimal for pomelo.

Add a handful of sand and leaf litter at the time of planting to improve drainage as the plant hates compact soil.

Watering

Pomelo grows best in a growing medium that stays a little on the moist side but that doesn’t mean you end up overwatering the plant. The best rule to follow is to water the plant when the top soil feels a little dry to the touch.

Do not water the plant on a daily basis and ensure the soil is never going dry completely. Water the plant more frequently in warmer and dry months as the fruits may fall if the growing medium is too dry.

Fertilizer

If you want to increase the size, taste, and number of fruits, then use a 10-30-20 blend, once in 4-5 weeks. Do refer to the label for instructions.

A monthly dose of a handful of bone meal will greatly help the plant to grow good fruits.

Before colder months, it would be a good idea to amend the soil with plenty of organic matter, as it will promote root growth, which will enable the plant to absorb water and nutrients well.

Pruning

Remove dead, damaged, and diseased stems from time to time so that they don’t compete for nutrients. After harvesting, snip away leggy branches. It will promote air circulation and will also make sunlight reach every part of the plant.

Pests and Diseases

Pomelo is susceptible to aphids, spider mites, mealybugs, leaf-miners, leaf-eating caterpillars, fruit-boring caterpillars, scales, red mites, fruit flies, nematodes, and rats. You can kill these pests by using neem oil solution or insecticidal soap.

In diseases, look for citrus scab, sooty mold, and anthracnose. Avoid overwatering the plant, do not wet the foliage, and make sure it gets plenty of direct sunlight.