Is it pruned as a tree-form (aka Standard)? It looks like it is. I think they can be more finicky than when allowed to have multiple main branches.

It may be just suffering a little "transplant shock" and will perk up in a few days. It's usually best to plant them in the fall or early spring. Deep, weekly watering throughout the summer months or they will have leaf yellowing and drop then like hot potatoes. Add a 2-inch mulch layer to cool the soil temperature, reduce evaporation and prevent weeds. Browse at this link to The Gardner's Network for lots of good information.

Rosie

It's been cooler here, that may help. It may want some shade till it gets more established. Make sure you are watering enough, dig down a few inches to see if it's still wet down deeper. Very pretty! Do you mind me asking where you got it?

I got this from local nursery. Red's in Chicago. It was not cheap either. I went to the nursery and asked them what to do and they said I may be over watering. We are very new to all this and previous owners never did anything because they had been planning to move to new place for almost 4 yrs.. so they never cared for lawn. Even grass does not grows... :( I know I m cribbing a lot... but wth restricted budget... it is really really important that these things survive... hoping for the best. Thank you all for responding

I would expect transplant shock - and if its hot it may need more water. definitely check the soil. I can't remember if you are humid or dry weather. if dry, hose the leaves from bottom up daily - helps cut down pests such as mites or white fly that may have moved in too.... if you are humid, then not likely to be mites. give it a bit of time, watch for new growth leaves. Many times i get a hibiscus and it drops a lot of leaves and grows new ones more suited for its new home.

My Rose of Sharon was solid yellow, tried the iron, bone meal. The answer for me was Sulfur. My soil had a sulfur deficiency. Once I fed with sulfur, their returning to green from the bottom leave up to the top.

Hi, I‘ve been having problems with my hibiscuses in terms of yellowing of foliage. It’s the second year my hibiscus are starting with small yellow leaves.
I bought them about 3 years ago in a dormant stage, planted them in the front garden, they seem to be doing fine as they had bigger and lush green leaves. Then I moved and decided to take my 2 bushes so I put them in buckets where they stayed a winter (with the garden soil on roots).
Last year (2nd year) I reported them, but I did not wash and trimmed roots. I did the same this year with only one, but I’ll repot again bare-rooting first. (Would that be suggested?)
Now, last year eventually I used a fertiliser multipurpose doff and eventually foliage turned green but smaller & the flowers came also smaller than normal. ( I also sprayed for bugs and fungus).
This year the leaves are coming out again yellow, I repotted only one so far (about a 3-4weeks ago) with a mixture of multipurpose compost. The reported one didn’t really change much. I’m adding photos.
Please help with advice as to what to do to get them thrive. This foliage looks quite sad... Chlorosis? Disease? What am I doing wrong? They’re in a sunny position, maybe a bit windy this year and I could take them next to the fence (UK is windy), they’ve been sprayed, fertilised, but only with what I mentioned before. Thank you.

I've had the same yellowing problem. Planted 30 Rose of Sharon for a hedge. They were yellowing and dying. Local horticulture store had a product called Serenade, multi purpose fungicide. After a half hour of using the veins in the leaves starting turning green. It was amazing, transforming back to green to quickly. However, it was too expensive to keep my sharons green so I ended up pulling them all out. My experience leads me think it's something in the soil and sharons are too finicky.

ROS are weeds here...I roundup them (being as not much else can kill them). I would normally assume too water retentive a soil and/or too wet, but my yard is a swamp, and they sprout everywhere from the neighbors despite my war with them.
My soil tends toward mildly acidic and that may be key.

Well they tend to tolerate acidic and alkaline soils. My soil is alkaline and am glad to hear they are like weeds somewhere else too!!! I am not alone now. I just cut a bunch mid week last week and am probably 1/3 done only. Maybe.

Same issue here. It looks like sunscald. Mine is actually in FULL sun here in Eastern Washington and the tips are white. The lower leaves are slightly more green. I see rose of sharon and the other variety of hardy hibiscus all over Spokane and see many getting just as much sun as mine does, so I am a bit confused here. The leaves are not falling off and she is blooming beautifully. I only feetilized twice, 3 months apart, not much. I let her thoroughly dry, then soak her deeply about 3 times a week so she can beat the heat. Could I be watering her TOO much? This is her very first full summer here-planted last September. Ideas???

Pictures would help. Too much sun sounds unusual as it should thrive in full sun (although your RoS is still young). Over here, RoS does not complain in full sun, daily 100+F summer days.

The white tips on leaves sound strange, however. It could be an opportunistic fungal infection on top of browned tips, variegation, etc. Aphids are a pest that produces honeydew which can develop fungi and turn different colors including white but, it is rare to see it in the leaf tips only. In the middle of summer, I do observe some yellowing of leaves in RoSs planted in medians so you may be watering too little. Young plants with a small root system may need watering often, even daily. Established ones become drought tolerant. I assume you are mulching it?

https://www.nature-and-garden.com/gardening/rose-of-sharon.html#:~:text=%20Watering%20Rose%20of%20Sharon%20%201%20Old,might%20weigh%20down%20on%20roots%20and...%20More%20