leggy
adj.— «When plants did come up, they were undeniably “leggy,” meaning their central stalks were tall and spindly before their first leaves. Seedlings won’t necessarily die from being leggy, but they don’t grow up to be as healthy or strong as more solid plants.» —“Tripping the Light Fluorescent” by Kerri Conan New York Times APr. 8, 2009. (source: Double-Tongued Dictionary)