Congratulations! The new plant looks very young and nice. You need to "check two boxes" when researching if your plant will produce blue blooms in a new garden: your soil must have naturally occurring aluminum in appropriate quantities and the soil must be acidic (soil pH much less than 7.0) so the aluminum will not chemically mix with other minerals and become impossible or difficult to absorb through the roots.

Get a soil pH test kit to confirm if your soil pH is adequate. Kits are available at most plant nurseries although availability may be questionable during the winter season. Acidifying the soil with garden sulfur or aluminum sulfate may be required in order to produce blues or purples in alkaline soils (soil pH above 7.0). Follow the instructions on the package and observe the change as new blooms open (blooms that are already open will not change color or will not change the color much; also, normally white blooms will not change color at all). Apply the acidifying product forever per the product directions (every three months or ???) and follow the instructions precisely because (1) if you discontinue applying the product, the soil will have a tendency to slowly revert back to its normally alkaline pH and (2) the tiny, shallow, fibrous root of hydrangea plants could get burned by applying excessive amounts of these sulfur containing products.. If after applying the product for about a year or two does not yield the correct shade of color, proceed to slowly increase the amount applied of the product until you achieve the correct results that you want. A soil pH kit that gives numeric results may be more useful when doing this.

Some color changes may slowly occur when a plant is originally planted outside in the garden, as the root system slowly expands from a non-acidic potting soil medium and into an acidic garden soil.

Notes: Some rock mulches (like the one in your picture) may be alkaline and hydrangea plantings near cemented areas can also be in alkaline soil as cement leeches lime and lime raises acidic soil pH into alkaline territory.

Blooms tend to be pink with alkaline soils (pH above 7.0). Below 7.0, some blooms may turn purple and as the soil pH becomes much more acidic, the blooms turn blue. Also Also, there are some cultivars of hydrangea macrophylla that resist turning blue and turn purple instead at normally acidic levels.

There are too many cultivars that produce blue and purple blooms with very few differences so it is hard to identify cultivars. Can you ask the person who provided you with the cuttings?

Hi Luis, thank you so much for your explanation. I will definitely get the soil tested where it is planted now and again where I want it to eventually be planted long term. Can hydrangeas grow on the north side of the house?

"Can hydrangeas grow on the north side of the house?"

Yes, especially macs, which would prefer to be out of direct sun, certainly any intense afternoon sun.

Good to know, thank you gardengal.