Large, rounded leaves in bright lime green, up to about 5 inches across, form a vigorous mound on this coral bells. Heuchera 'Guacamole' grows 12 to 24 inches tall and wide in part shade, hardy from Zone 4 through Zone 9.
It takes more sun than most light-leaved coral bells and resists powdery mildew. White flowers appear in late spring and early summer.
Coral bells, Heuchera, are grown mainly for their leaves. The genus is native to North America, and most garden coral bells are hybrids of several of its species, which is why leaf color, size and ruffling vary so widely. The leaves are evergreen to semi-evergreen, so the mound keeps color through much of the winter, and small bell-shaped flowers rise above it on wiry stems in late spring or summer, where hummingbirds and bees visit them.
Most coral bells color best in part shade, with morning sun and shelter from hot afternoon sun, though dark-leaved types and those bred from Heuchera villosa take more sun and summer heat than light-leaved ones. They need soil that drains well, especially through winter, and struggle in heavy ground that stays wet. The heights given are for the leaf mound; flower stems stand taller.
The big, bright leaves light up a dark corner and contrast with purple or black foliage.
