I read somewhere that the biggest limitation for gardeners is time (as opoposed to money or climate I suppose). I guess this can mean hours per day or years per lifetime, and sometimes one seems more meaningful to me than another. Ed Rasmussen, the guy who runs The Fragrant Path, summed up my attitude toward all this when he said, referring to growing shrubs and trees from seed, "if not planted, they will not grow". The point being that if you plant the shrub that takes forever to flower now, in no time at all it will be flowering away every year.
A couple years ago I printed a picture of the Japanese wisteria I planted from Carroll Gardens which took several years to produce a few flowers. Last year it produced even fewer but this year is is literally covered in blooms, so many I can't begin to count them. Here are a couple pictures:
This pergola Joe and I built in front of the house contains 5 sections, and the wisteria is now most of the way through section 2.