With their improbable , upright shape and disc - corresponding flowers , hollyhocks add a bright fusillade of color and superlative to a garden . Hollyhocks spring up up to 10 feet tall with individual flowers that flower along the tall capitulum . bloom during summertime , althaea have a clip-clop growth wont and moderate growth rate . alternative to hollyhocks have similar shapes and ontogenesis use to create an equally outstanding garden design .

Kopper King Hibiscus

Kopper mogul hibiscus ( Hibiscus ' Kopper King ' ) , standardised to the althaea , has saucer - like blooms that grow in a wide range of colour admit white-hot and pink . Growing 3 to 6 feet tall and 1 to 3 foot wide , kopper king hibiscus peak blooms are ruffly and grow 10 to 12 inch wide , make for a magnanimous bloom head . The reddened " middle " on the kopper king hibiscus contrast with the flower petal , interchangeable to the display of the hollyhock bloom . A butterfly stroke attractant , kopper king hibiscus rise in upright clumps , like the althaea , and have bronze to violent foliage . Flowers come out get in mid - summer and light up the garden through dip , reach for a long - lasting blooming season . Kopper king hibiscus call for full sun to part tincture and moist , nutrient - fertile soils . To raise a long flowering season , remove the spent bloom of youth . The USDA Hardiness Zone for planting is 4 to 9 .

Rose of Sharon

Rose of Sharon ( Hibiscus syriacus ) is a deciduous bush that has interchangeable blooms to the hollyhock . The crepe - tenuous flower petal develop 2 to 4 inches wide and get along in a wide kitchen stove of colors including red , violet , white , purpleness and some motley blooms with more than one colour whirlpool together . Like the althea , rose of Sharon grows magniloquent , between 8 to 10 foot . Its width , 6 to 10 feet , helps to make a privateness roadblock for the garden or plant as a focal point to the landscape . Rose of Sharon has dark green to average green leaves that grow 2 to 4 in recollective with a toothed edging . Drought - kind , rise of Sharon blooms in summer and lasts into the crepuscule . Rose of Sharon requires full Dominicus to fond shade and well - drained , moist soils to flourish . The zone for planting is 5 to 8 .

Monkshood

Grown along tall stalking , similar to hollyhock , Aconitum napellus ( Aconitum spp . ) is an unsloped perennial that is an ideal option to hollyhock . The bluing to purpurate hood - shaped salad days grow in upright spikes up to 48 in tall and are oftentimes tinged with yellow . emerge in mid to late summertime , the toothed , deep immature leaves of helmetflower are lobed and present themselves in chunk . Monkshood prefer full sunlight to part shade and moist , well - drained soils . To grow in other areas of the garden , split up monkshood in the gloaming . The geographical zone for planting is 3 to 7 .

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