They are low-maintenance and thrive in poor soil once established

a heat mat helps

After blooming

Yes—lotus are fish-safe

lush green foliage

10 Green Brain Cactus Seeds Lemon They are low-maintenance and thriveGrow the Most Unusual Cactus in the World Green Brain Cactus Imagine a cactus that looks like a tiny green brain sitting on your shelf. The Green Brain Cactus (Mammillaria elongata cristata) is one of nature's most bizarre and captivating succulents a rare crested mutation that forms wavy, brain like ridges instead of the typical round shape. This pack of 10 seeds gives you the chance to grow this conversation starting collector's plant from scratch.