last summer I bought a 4' lemongrass
start. It's now 7' tall and going to seed but still looks good, kind of like a thin pampas grass. Here's my question: I live in zone 9b, the very south of Texas on the coast. Should I cut this plant down to knee height, the way one would purple fountain grass or any other ornamental grass? I use it for cooking all the time and it would be great if I could expect it to continue in such a robust and graceful manner, but would cutting it back be better in the long run?