Vini, not all Hibiscus syriacus are as "weedy" as the lovely sterile varieties. The pictured shrub may not produce seeds. I'm guessing it was planted so near the house to protect it from the colder Michigan temps. It can be transplanted to another location and it doesn't need that trellis for support. Check out the helpful information at the link below. Here is a link that might be useful: Rose of Sharon

Regarding Golden Celebration & water needed - I've found it needs no more nor less than other roses here in central Virginia. But we have a fairly high average yearly precipitation at 50" or so - perhaps similar to your garden? This June & July rainfall was steadier than typical, and all the roses loved it - never seen them bloom so abundantly in July before. As far as support - agree not necessary - depends on what look & form you're after. Decided to corral mine within a structure when it began to reach far into the arms of its companions - though that was a lovely look on its own, it didn't suit the location of that bed between the front walk & porch. (I like the abundant nearly wild look, but my husband prefers a more cultvated restrainment, so we compromise in that prominent location.) This is my report from July of this year, and you may want to read the full discussion in the link. Planted Golden Celebration 4? years ago in the center of a garden bed that spans the front porch. Saw within a year that it wanted to grow tall & left it to its own devices to arch for two years trying to figure out how to support it vertically. Assembled a 2-foot square copper pipe obelisk around it rising 9' from ground level. It's not tied to the supports but simply confined within them, which shapes it into a pillar form with the branches finding their own way within the verticals & spilling out over the cross pieces. Like this tall narrow yet full effect, the structure it bears as a centerpiece & the room given other plants in that bed. If the obelisk were removed today, the rose would easily arch down to a width of 15' & overpower the scale of the planting & its neighbors. Mine started with lax thin canes but has firmed up well over time so the blossoms' stems face outwards instead of nodding as they did at first. The framework supporting it allows it to arch gently & it has many flowering shoots all along the branches. Just counted 18 along 2' of cane, and many of those are budding their own clusters. I've never pruned it, just deadhead the sprays. No dieback here in central Virginia just east of the Blue Ridge Mountains & no disease despite my lazy no-spray ways. At first the blooms came mostly one to stem, but ever since has put out sprays of at least five. Repeats so rapidly, with so many clusters budding as others are blooming that I'd have to call it continuous from mid-Spring past the first frosts - anywhere from mid-April through to Christmas. Love the scent & the nuance of color. Only in temps in the high 90's does it bloom plain yelllow. In the early flush its first Spring after planting the preceding Summer, some blooms were half bright tangerine & half egg-yolk yellow, as if they had a line drawn down their centers. This rose has never ceased to delight & amaze me. May it do so for you! Here is a link that might be useful: Golden Celebration

Mine was doing same thing. I trimmed off most of the leaves except for the tups/ It helped alot, it has sarted to grow up right now. I have it in a container and also wonder if that has anything to do with it.

It is necessary. There's been a few recent threads on this topic (you can find Search at the bottom of the front page, right before the 'Post a Message' section). Anything over 10" needs it according to the experts. Also depends on how thick the stone is though, 2cm or 3cm? 3cm is good out to the 10", not so with 2cm. - D