Melocactus Azureus Care & Buying Guide

Melocactus Azureus


Light requirementsHigh
Water requirementsLow
Ease of careEasy
Temperature resistanceNot frost-hardy
Growth speedMedium
Indoor growingSuitable


Taking Care Of Melocactus Azureus

Ideal conditions

Growing up to the quite considerable 12 inches of height and 8 inches of diameter, the magnificent Melocactus Azureus is best to grow outdoors. Another reason to keep this cactus outdoors is its light demands – full to partial sun is the best for this cactus.

Temperature-wise, keep this cactus in warm spots and protect it from cold – it isn’t frost-hardy.


In spring and summer, water Melocactus Azureus just like many other cacti – only when the soil is dry to the touch. Such a regime of watering will allow you to keep the plant hydrated while avoiding root rot.

In winter, Melocactus Azureus should be watered very little. The cactus is dormant during the cold months, so its water needs are very low. With that said, Melocactus Azureus shouldn’t be allowed to dry completely even in winter. Zero water in winter works pretty well for many other cacti, but the Melocactus Azureus cactus is sensitive to lack of water.

Where to plant

Plant Melocactus Azureus in a fast-draining cactus mix. This will allow you to avoid waterlogging and root rot. For added drainage, you might also add pumice or perlite in a 1:1 ratio.

Melocactus Azureus’s pot should also have large drainage holes at the base for sufficient drainage.

Thriving on full sun, Melocactus Azureus is best for outdoor growing. It should be placed in a spot that receives sun all day long for optimal results. With that said, on hot days, sunburn is highly likely, so you should temporarily move the cactus to a shaded location in such cases.

Indoor growing is also possible with Melocactus Azureus, though not optimal. Only keep this cactus inside if you have a sunny window sill where the plant will receive plenty of light. But again, move the pot to a shaded location on hot days.

During fall and winter months, pay attention to outdoor temperatures and move Melocactus Azureus inside if it gets cold. This cactus isn’t frost-hardy and shouldn’t be exposed to cold for too long.

General care information

For best growth, you may want to fertilize your Melocactus Azureus during its growth season, which is spring and summer. Use a cactus fertilizer diluted to half strength. Fertilize the cactus once every 4-8 weeks.

A fairly bulky plant, Melocactus Azureus can outgrow its pot fairly quickly. With that said, this cactus likes when its roots are constricted, and it doesn’t need plenty of room to thrive.

Repot your Melocactus Azureus at the beginning of the growing season. Allow the soil to dry before removing the cactus from the pot. Once you get the cactus out, inspect its roots and cut away any damaged or rotten parts. Replant the cactus in a new container and don’t water it for about a week to allow it to recover.