Friday, June 22, 2012

Penstemon

Penstemon "Electric Blue"
Penstemon x mexacali

zones 6-9
western US native
prefers hot sunny locations
aka Beardtongue
1-3' tall
good for cut flowers
attracts hummingbirds
tolerates dry soil
doesn't like to be crowded
apply compost thinly each spring and 2" mulch to retain moisture and control weeds
purchased at Garden Fever Summer 2011
needs 1" water per week
after frost, cut stems down to 1-2" above the ground
dig up and divide rhizomes every 3-5 years
prone to root rot in the winter

New ones are easily started from cuttings taken in autumn, rooted indoors, & put out in spring to supplant exhausted clumps. Although they may self-seed to remain in the garden without attention, seedlings do not ordinarily grow to be exactly like the parent plant

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