ShrubsDiscover the right shrubs for your garden.
Paraplu Violet ® rose of Sharon . photograph by Proven Winners .
Hibiscus plant life are n’t only for the Torrid Zone . In fact , some hardy hibiscus varieties , like the pop rose of Sharon , can overwinter out of doors in temperature as cold as 20 ° below zero .
On this page : Basics|Planting|Care and Maintenance|Pictures|Design Ideas|Is rose of Sharon invasive ?
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Buy rise up of Sharon plant life from Proven Winners .
BASICS
Botanical name:
Hibiscus syriacus
Common names:
Rose of Sharon , shrub althea ; also share the common name hardy hibscus withHibiscus moschuetos .
Zones:
Generally 5 - 9 , with some exceptions .
Height/Spread:
8 to 12 feet tall , 6 to 10 feet wide , depending on the variety
Exposure:
Full sun to fond afternoon shade ( unspoilt unfolding in full sunshine ) .
Soil:
Prefers moist , yet well - drained grime ; mulch to help retain moisture .
Bloom Time:
Rose of Sharon bushes start blooming in July and persist in into crepuscule or until the first rime .
Flower Color:
subtlety of white , pinkish , scarlet , and majestic ; sometimes with a contrast throat .
Foliage:
Deciduous ; with medium - immature , heart- or maple - forge leaves , although there are a few exceptions .
PLANTING
Blue Chiffon ® Rose of Sharon . pic by : Proven Winners
When to plant:
Rose of Sharon plant and other stout hibiscus varieties can be implant in natural spring or fall , as long as there is no danger of frost .
Where to plant:
Full sun to fond afternoon ghost . An sphere with good air circulation produces the best flush and strong stems , and is the unspoiled surround to prevent disease . Keep an optic out for spicy , scorching afternoon sun that may burn the leaf ; as well as supply trade protection from damaging wind .
How to plant:
Seeds can be started indoors and then transplant , but it is more coarse to plant potted plants purchased from a nursery . Dig a hole twice the width of the stool and place the plant in . check that the crown of the plant rests just at or above the soil lineage . Backfill the trap , and water well .
CARE
Fertilizer:
Hibiscus need a fertilizer eminent in potassium ( K ) , low in morning star ( atomic number 15 ) , and with a medium amount of nitrogen ( N)—too much phosphorus will kill a hibiscus . Hibiscus also respond well to anorganic fertilizer , and a good layer of compost once a twelvemonth is broadly sufficient . Do n’t fertilise after July as this can push novel development that will be damage by freeze .
Water:
They favor moist soil and do not tolerate drought . urine on a regular basis and up to twice a Clarence Day in hot weather , especially if in a container . make out water supply back a bit in stale weather . urine - stressed hibiscus may drop their bud or become more susceptible to dirt ball and disease . They should not be lead in stand up water as this can boost root harm / root rot .
Magenta Chiffon ® rose of Sharon . photograph by : Proven Winners
Pruning:
trivial pruning is require , and is generally only needed to maintain appearance , size , and pattern . They can be slew back 4 - 6 inch from the ground in spring , anytime before the Modern growth emerges . Pruning before very cold temperatures or in utmost heat can be very trying to your industrial plant and do more harm than good .
Tip pruning can excite branching , and since more forking means more flowers , a little trimming late spring to former summer can be a good thing .
Deadheading:
To help prevent an over - teemingness of seed pod from forming ( some form may re - seed extravagantly ) . ( Or , for a similar feel , try the non - seedingSummerific ® series rose mallows . )
Overwintering:
fearless varieties will expire back to the ground in the winter in colder regions , but new ontogeny will train from the stem in mid to late spring from the radical summit . In cold climate , cover the root lump with mulch to isolate it .
Diseases and Pests:
brave hibiscus can diminish prey to a bit of pests , includingJapanese beetles , whitefly , aphids , and ants . Ants can be more than a mere annoyance on your hibiscus , as they will really play aphid eggs to the hibiscus so that they can feed off of the spin-off the aphids produce from go down on the tomfool from the leaves and flowers . Hibiscus may be susceptible to dieback disease , wilt disease , and leaf fungus .
HIBISCUS PICTURES
pic by : Proven winner
Blue Chiffon ® —Buy now from Proven WinnersHibiscus syriacus
Zones:5 - 9Height / Width:8 to 12 foot grandiloquent , 4 to 6 feet wide
Grows vigorously with a rounded wont . flower have a fluffy center and produce few seeds . Provides beautiful downhearted late summer colour in the garden .
Awarded2020 Flowering Shrub of the Yearby Proven Winners .
Also available in pinkish , white , coloured lavender , Battle of Magenta , and Starblast . See morerose of Sharon plants from Proven Winners .
Purple Pillar ® —Buy now from Proven WinnersHibiscus syriacus
Zones:5 - 9Height / Width:10 to 16 feet marvellous , 2 to 3 feet wide
A unique variety that maturate tall and narrow , instead of broad , establish it a great pick for privacy screening , hedging , containers , or any narrow quad . Semi - double flowers bloom along the entire length of the shank . Little to no pruning is needed .
2023 National Landscape Shrub of the Year
Also available inWhite PillarandRed Pillar .
Paraplu Adorned ® —Buy now from Proven WinnersHibiscus syriacus
Zones:5 - 8Height / Width:8 to 10 fundament tall , 3 to 4 feet wide-cut
A arresting display with its variegated foliage and across-the-board , light purple flowers . flower throughout the summertime , it draw pollinator and add vivacious life to your garden . Ideal for specimen planting , hedging , or as a striking backdrop in a pollinator garden , this plant is a various and easy - care choice .
See others available in theParaplu serial publication .
Paraplu Violet ® —Buy now from Proven WinnersHibiscus syriacus
Zones:5 - 9Height / Width:5 to 8 ft tall , 4 to 5 invertebrate foot wide
The cool blue - reddish blue flower work a glow to the garden and bloom for weeks .
Pollypetite ® —Buy now from Proven WinnersHibiscus sp .
Zones:5 - 9Height / Width:3 to 4 foot tall an wide of the mark
This compact , nearly seedlessrose of Sharon ensures that everyone has room to grow one of these beauty !
Sugar Tip ® —Buy now from Proven WinnersHibiscus syriacus
Zones:5 - 8Height / Width:5 to 6 feet marvelous , 4 to 6 feet wide
Sugar Tip ® rose of Sharon features showy variegated foliage and fluffy pink twofold blooms — and itdoesn’t produce ejaculate , so no undesirable seedling !
Azurri Blue Satin ® —Buy now from Proven WinnersHibiscus syriacus
Zones:5 - 9Height / Width:8 to 12 feet tall , 6 to 10 feet wide
Enjoy true - blue blooms all summer with Azurri Blue Satin ® rose of Sharon — aseedless , low - maintenance variety that wo n’t take over your garden .
boast in : Garden Design ’s Top 10 Garden Trends for 2022(“Including Plants that Transport You to the Tropics " )
DESIGN TIPS
IS ROSE OF SHARON INVASIVE?
Hibiscus syriacuscan be invasive in the travel along country :
To see if rose of Sharon has been identified as trespassing in your area check outthis mapfrom InvasivePlantAtlas.org .
If concerned , essay seedless varities such asSugar Tip ® andAzurri Blue Satin ® , or nearly seedlessPollypetite ® .
Related : grow Rose Mallow ( Swamp Hibiscus)Tropical Hibiscus Growing GuideFlowering ShrubsTropical Gardens
