Before the trim you can see that this year’s blooms are now green. The photo at the top of my blog are the same plants in Spring and early Summer when they are blue.
A look at the base, you can see last year’s brown wood which bloomed this year and the young, green wood that will produce blooms next year.
After the trim, the old wood has been removed and new wood is left for next year’s bloom. These four foot stems may produce some branching by Fall.
Plenty of wood to make cuttings. I usually start about 10 or so pots with 3 to 4 cuttings each and give them away the following year.
Now they have been thinned. The beds will be cleaned of any weeds and mulched in the Fall when the maple leaves and pine straw falls. We have acidic soil (Pines are a clue to that!) so the blooms will be blue. You will have to change the soil’s PH to get pink blooms.
Arthur in the Garden! 
Do you root the old or new limbs you cut off?
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Yes.
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