Ha ha ha! Cultivation tips for rhubarb? You're kidding, right?...

Horsepoop definitely helps it out, but as soon as the snow is off the ground the stuff is bursting out anyway. You have to dig 3 feet down to the root, cut it out, put a stake through its heart, mutter an ancient incantation in Druidic and burn it with a holy blowtorch to kill it. It grows like a weed. We were harvesting the stuff on an old abandoned family farm that nobody lived on for 35 years and even gone wild, the stuff was sweet as the product of our own backyard garden.

Just let it go and pull it out when it's thick and red before it goes to seed, snick off the top and base and do whatever you do with it. I'd have a good laugh watching anybody out there thinning it or dressing it up in little skirts and collars. What, do you comb your chives too?