Rose of Sharon in hot, humid climate

wintercat_gw

8 years ago

Hi, will Rose of Sharon (Hibiscus Syriacus) thrive when average summer temperatures are as follows:

July: 87.4

August: 88

Sept.: 87

No of days per month with temp above 86:

July: 21

August: 28

Sept.: 15

I'm planning on Althea and Pink Giant. The plants will be in full sun. Will the flowers fry? It's also very humid here.

TIA!

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Marie Tulin

8 years ago

last modified: 8 years ago

Putting in my plug for a little research before you buy. There are "sterile" varieties now that will save you a lifetime of weeding the all buggering babies they make. It is either the Chiffon or Satin series. You have no idea how prolific the fertile ones and how time consuming it is pulling the thousands of seedlings.

The sterile ones are as lovely as any of the other ones. I'm going to look them up now so I can be more assertive in the next recommendation I make. Not the ones I was thinkiing of but here's a start:

"Four of them are U.S. National Arboretum introductions: 'Diana' (white), 'Aphrodite' (pink with a red eye), 'Minerva' (pale lavender) and 'Helena' (white with a red eye).

You might also run across a new Proven Winners variety called 'Sugar Tip,' which is pale pink with variegated leaves. That one doesn't produce seed."

and "Blue Satin" (from Mobot), there is also Rose, Azure,

Culture

"Easily grown in average, medium moisture, well-drained soils in full sun to part shade. Best flowering occurs in full sun. Prefers moist, organically rich soils, but tolerates poor soils and some drought. Very tolerant of summer heat and humidity. Generally tolerant of urban conditions. Flowers appear on new growth, so plants may be pruned to shape in late winter to early spring. Pruning back to 2-3 buds may produce larger blooms. Easily propagated by stem cuttings. This is a sterile cultivar that does not produce viable seed."

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Comments (11)

ken_adrian Adrian MI cold Z5
8 years ago
it would have taken much less typing if you just gave us zone.. and a big city name ...

those temps are nothing compared to MI in summer ... and i have no problems with them

flowers are of quite short duration ... regardless of of all your variables ...

ken
Suzi AKA DesertDance So CA Zone 9b
8 years ago
It's very hot here, and rarely humid, but I've got one and it grows just fine in summer heat that goes no higher than 104. I think it would do fine in even hotter weather, but 104 is as hot as it gets here with averages in the 90's. You can pick the spent flowers, dry and make tea from them. Not sure what variety this is. Was here when we purchased this property.
It's on top of a rocky hillside and a little hard to reach.
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gardengal48 (PNW Z8/9)
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Can grow anywhere in the US, including very humid and hot summer areas - the midwest, Texas, all of the southeast and midAtlantic area - to the point where it is considered borderline invasive in some of these areas.
Suzi AKA DesertDance So CA Zone 9b
8 years ago
Mine might be sterile. Have never ever seen one seedling, but we do have really poor soil and it's hot here.
wintercat_gw
Original Author
8 years ago
Thank you all for taking the time to help me!

Ken Adrian - I'm not in the US but in Israel. Can't determine my zone. Sometimes I think it's 9, somtimes 10, so I converted our Meteorological service data from Celcius to Farenheit to give an accurate picture of the climate.

Suzi DesertDance - That was just what I was hoping to hear! Thanks for the photo. Such a lovely flower.

Gardengal - Thanks! You and Suzi made my day!

Marie Tulin - Thanks for the detailed info! I'm a wiser Cat now! There's one nursery here that grows the Chiffon series and I checked their site. The flowers a a bit too pale for my garden colour scheme. I like deeper shades and Pink Giant just takes my breath away so I don't mind pulling out seedlings for the rest of my life. I'm not sure we have the Satin series here but I may be wrong.
gardengal48 (PNW Z8/9)
8 years ago
The plant is actually native to much of the mideast, India and into China, so should be expected to do well for you.
Suzi AKA DesertDance So CA Zone 9b
8 years ago
This morning I went out and took a shot of the whole bush. It's pretty big and as you can see, located on top of a hot windy hill. It has drip irrigation. In front of it is a 3 year old baby fig tree. We could use some green up on that hill!
Smivies (Ontario - 5b)
8 years ago
It will do better in a hot humid versus a hot dry climate. Israel has never struck me as a particularly humid climate...Mediterranean yes, humid no. Should be fine regardless but they are not overly drought tolerant.
wintercat_gw
Original Author
8 years ago
Why this is wonderful! ! I wish I had a hill to plant :)

Israel's inner coastal plain is rainless most of the year, but very humid in summer. A real Turkish bath. I'm glad to hear hibiscus fares better in humid rather than dry climate.
davidrt28 (zone 7)
8 years ago
last modified: 8 years ago
"to the point where it is considered borderline invasive in some of these areas."
I would say there's nothing borderline about it here. It's the most invasive commonly cultivated garden shrub I know of. You can spot big clumps of them in rough parts of Baltimore, Chester, Philly, etc. competing with "ghetto palms".

Rose of Sharon in hot, humid climate

Marie Tulin

Comments (11)

ken_adrian Adrian MI cold Z5

Suzi AKA DesertDance So CA Zone 9b

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Rose of Sharon in hot, humid climate

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