The tag means it will tolerate both a full sun OR a partial sun situation. Paniculatas are arguably the most sun tolerant of all the hydrangea species, so full sun is typically not an issue regardless of cultivar, as you've experienced :-) But the plant will also grow and bloom well in a part sun/part shade location. In very hot climates, this is often a bit more desirable, the ideal being a bit of shaded protection from the intense afternoon sun.

Lucky you. Like gardengal48 says, the further north you live, the more they can withstand full sun conditions so try them out. Over here, they must be in part shade or the leaves will fry.

PS - You could also leave them in the desired planting location while they are in a pot and move the pot around if turns out to be too sunny.

Luis and gardengal - thanks so much for your replies.

I actually did keep the potted plants in full sun today and the leaves were fine - just like my other hydrangeas. I am loving these hydrangeas - I do nothing but trim them in the spring and they bloom all summer.

I understand the two that I bought will bloom a month earlier ("Bulk" - Quick Fire) and so I will see if that is true next year.

Thanks again - Carrie

I have one QF in full sun, plus mostly evening sun and it has not even blinked an eye. My other QF is in partial shade and receives probably 4 hours of sun. Both were one gallon plants planted last year (very small). The one in full sun is about 5 by 4 foot. The partial shade is about 2.5 by 1 foot. Not much bigger than it was last year. I have never seen a hydrangea grow so fast as my one in full sun! Never has wilted once. You will be happy with them!!! One of my Favorites!!! It was in full bloom my June 1st and I am in Zone 5b!!!