Rocking rocket

I can never quite understand how to take care of rocket. When I lavish too much care and attention, they collapse and die. But when I leave them in our office's balcony, they seem to thrive. Mind you, our balcony is so hot, most plants just drop dead. 

These two pots of rocket have been here for months. Sometimes they get wrinkly from the heat but after dousing with water, they bounce back to life again.

I'm going to cut some leaves for dinner tonight. The more I cut, the faster new leaves will grow!