You are not the only one having that problem. I noticed today that some of my hydrangeas are trying to leaf out too (not on all the stems but still...)...

I can see cold temps arriving and killing the new growth; it has happened before. Luckily it does not kill the plant.

The same problem sometimes occurs when winter protecting shrubs outside. The new growth comes out of hibernation looking light green or even white. Lord, oh Lord.

I don't see a problem. Just don't put them outside til the danger of hard frost has passed... Feel free to throw in some fertilizer in April and July and if you intend to sink them in the ground I would try April or September. This winter has made many things act goofy. For example my butterfly bushes still have healthy leaves on them which should give additional growth a BIG head start. Also you may notice that people's daffodils sprouted about 3 weeks ago and some people's daylilies didn't die back completely. Heck my snapdragons have made it so far and I think that dusty millers are the newest evergreen in the northeast!

I was walking yesterday and also saw dusty millers pretty much alive. Unbelievable...
I do not see a problem with sprouts. You can nip them at the top and give them some source of light, otherwise they will be very leggy. Pale green will turn darker green pretty fast after you provide some better light.
I usually overwinter my miniature roses in garage and they grow these long pale stems in winter, but after I put them outside they behave normally. I would stay away from fertilizer for now though while they are still in garage. It will not make them greener, they need light for that.

I'm in the Philadelphia area, and just noticed my hydrangea starting to leaf out today. Daffodils have been starting to sprout for a couple of weeks. I even have a couple of "annuals" in my porch pots that never died. I'm very afraid of a late frost; last year, we had some snow and a freeze in early April, and the hydrangea's old wood died. My poor baby only had interior flowers, very few on the outside! I don't want that to happen again.

Here in North Alabama we lost our hydrangea buds last year due to hard freezes and since our weather is usually good I don't cover. With that said I didn't cover this year either. I have about 20 and all of my mop heads have buds starting to open. If the weather holds this should be a great year for flowers.

Thanks all. I've been taking them outside for a few hours a day when I can. Don't want to leave them in too much sun or wind for long so I don't put them out when I'm not around. They seem okay so far - greening up a bit. We should be getting some pretty cold weather this week so I'll keep bringing them inside.

It's going to be a long April bringing them in and out, and I'll be away for part of it so I guess they'll just have to stay in the garage. I will be putting them in the ground eventually - I was thinking mid-May. Springwood Gardens - I know you said April but I'm worried about that because they're so young.

How do you find out when the danger of hard frost has passed?