Yeah, the box store bushes are usually 1 year old starts from cuttings, and they are almost always 2/3 dead.
You can propegate them yourself from cuttings for next to free if you want. I'm still pruning bushes, and you can have all the prunings you can haul away.
Just snip the new growth about 4" and make sure there is a growth bud on them, and stick them 2" into Peat/sand mix with some Hormodin.
On buying the things, stick with certified plants from a reputable greenhouse like Hartmans, or the larger growers that sell plants to other growers, such as Stokes, Llerana(Tripple L farms), and even DeGrandchamps. They all offer 3 and 4 year old potted plants.
The thing is, the first 3-4 years, they need to concentrate on root growth, not canes, to be healthy in the long run.
Most growers, myself included, stick with 2yr olds, and prune them hard for 2 years. Root production is everything, and the production from 4yr old plants is minimal anyhow.
At 6-7 years, you will be pruning out the original canes anyhow.
Most varietys here in Michigan are productive for 30-50 years, with a gradual decline after 30 until they settle in at about 60-70% of their peak as long as they are pruned.
Literally backing the brush chopper down the rows, results in rejuvenation and a fairly decent increase in production for several years. Some of the old guys around SH have 50yr old bushes in the fields, that were propagated off cuttings from Stanley Johnsons research lab back in the day. The economic threshhold of replanting and the lack of production for 7-8 years, doesn't favor ripping out old bushes on good ground.
When you see whole fields getting ripped out, it's usually a change to a new variety.
The economics of production have shifted in the last 5-6 years, towards later varietys, and away from the mid season. The premium prices come early and late nowdays.
Early varietys get clobbered by cold damage too often, so LOTS of growers are ripping out the old Weymouths and going late.
If you want a whole farm....lemme know.
Prices are going to be at or below record lows this year, so we will probably just do a limited harvest, and leave the rest for the birds.
Bring buckets, and fill them up. Just gimme a heads up a week ahead.