Long and thin, like a stalk of a plant.(adjective)
Of a plant, having stalks(adjective)
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Use "stalky" in a sentence
"It chanced that there was but one of them on duty in the wood that morning -- a certain short, stalky little fellow whose name was Walter Skinner, and who was fond of speaking of himself as a king's man."
"At the second transplanting, Hiram snipped back the tops, and the roots as well, so that each plant would grow sturdily and not be too "stalky"."
"Never put anything on Facebook that you would not want your boss, your creepy stalky ex-lover, or your young students/clients to find out."