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Alcea
rosea
Hollyhocks
Type: perennial/biennial
Height: 4-7’
Hardiness: Zone 4-7
Light requirements: Full sun
Bloom Color: wide range
Comments: Hollyhock is a
biennial but self seeds giving
the appearance of a perennial. These short-lived plants
produce flowers covering a wide range of colors. Alcea
prefers a rich soil with lots of organic matter. Provide
exposure to full sun as the plant dislikes any amount of
shade. Because the coarse foliage is attacked by
diseases, especially rust, plant hollyhock near the back
of the garden. The diseased foliage will be hidden by
shorter plants. Pinching one or two times early in the
growing season gives shorter, plants with more branches.
Dormant terminal buds are sometimes injured by freezing or
over watering, so provide a mulch for winter protection.
Double flowered types may need staking as they fall over
after a rain because the flowers will hold a large amount
of water.
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