I'm new to the hibiscus world and likely over-paranoid, but I'd rather be safe than sorry given my love for this plant. Attached is a shot of my rosa-sinensis 'Cherie' that I picked up about a month ago and had under a full spectrum grow light (daylight timer) until earlier this week.

I've noticed the upper leaves are tending to curl and yellow a slight bit (possibly starting with the garage/grow light but I'm noticing it more now). Is this normal or is something wrong with my watering/placement?

We've been experiencing spring here in Northern California with highs around 75°F/24°C and lows dropping into the mid-40's F (~7°C) so I figured it was safe to move the plant outside. Most of the stuff I've seen on this varietal (including the tag that came with it) call for full sun, but I'm afraid I might be burning it a bit? I have it in cactus/palm soil for drainage and have been fairly careful on the watering (the soil was starting to grow a little bit of white fungi while it was under the light in the garage).

Any insight/advice is appreciated. Here's a picture along with a bonus shot focused on the bloom (the first since I've had the plant -- just beautiful). Thanks in advance!