The cuttings look like they are sufficiently old to be moved to a larger pot with ericaceous (acidic) potting soil for azaleas, camellias, hydrangeas and blueberries. Once the root system has matured more, it can be planted in a location that gets only morning sun and afternoon shade; has 3-4" of organic mulch (no rock mulch); gets evenly moist soil in the summer (you can reduce the amt of water once it goes dormant but continue watering throughout winter to avoid letting the soil get bone dry). Hydrangeas have a very shallow (4") root system with tiny, fibrous roots so avoid disturbing them as best as you can. Test the soil often to see if it is either dry, moist or wet. Aim for moist always at a depth of 4" when planted in the ground. Do not water if the soil is already wet. After watering, periodically confirm you used enough water by checking that the soil at a depth of 8" feels moist after allowing for the water to percolate. Never water the leaves. This species of hydrangea blooms on old wood or on both old and new wood. It will develop dormant flower buds somewhere between every July-September inside the ends of the stems. Then the buds typically open in Spring. Remontant cultivars (called rebloomers in advertising) will produce a second flush of blooms in late summer/fall from new stems that started growing in the spring or as soon as those new stems get tall enough to produce flower buds and immediately bloom. The plants break dormancy in two stages. New stem growth typically appears first. Leaf out of the leafless stem occurs much later, as late as the end of May in the south. First blooming of cuttings can be unpredictable so give them a pass if they forget. To remove brown mophead blooms, deadhead them by pruning above the first pair of leaves. You can also let mophead form blooms drop but be aware they tend to remain attached for almost less than a year. But if this cultivar produces lacecap form blooms, it will self-clean the blooms quickly once the fertile flower in the middle of the bloom are pollinated.
