Brent Wilson · Gardenality Administrator · Zone 8A · 10° to 15° F · Comment About Planting
Plant Hollyhocks in a location that provides full sun and moist, rich but well drained soil that doesn't stay too dry. If the site it a drier one, you'll need to supply supplemental irrigation during periods of dry weather.
If you are planting seeds, sow the seeds outside about a week before last frost. If you are planting container-grown plants purchased from your local nursery and garden center plant in spring when there is no more danger of frost. Hollyhock seeds can be planted right below the soil, no more than 1/4 of an inch deep. Space the plants at least two feet apart to avoid overcrowding.
Brent Wilson · Gardenality Administrator · Zone 8A · 10° to 15° F · Comment About Pruning
Flower stalks can be removed after the flowers have faded or you can leave them on the plant so they go to seed. Hollyhocks are reseeding biennials. Plants can be cut back to the ground in late fall and mulched.
Brent Wilson · Gardenality Administrator · Zone 8A · 10° to 15° F · Comment About Problems
The most common problem with Hollyhocks is rust. Rust can be controlled with fungicide however prevention is the best method. Space plants properly so they get good air circulation. When watering, water from below the foliage.