Question: Should I fertilize any of these azalea? I have Hollytone azalea ferilizer but did not use it when they were planted last summer. I just held on to it in case it was ever needed.

The soil is very neutral, ph of 7 everywhere except within a foot or two of the ceder trees on the left, where it is ph of 6. All the soil is a very dry, sandy/powdery grey soil fairly devoid of nutrients and drains well but can stay moist under the mulch for days due to the tree shade once they leaf out. After planting the azaleas I put down some soil acidifier (same brand as the hollytone) but it was just sprinkled on top and watered in. Then pine bark mulch in early winter. The soil readings haven't changed still.

For all the ones who lost their buds, I really only care about getting some healthy leaf growth on them this year. I've read that fertilizing azalea will make them focus on green growth instead of flowers, so great! BUT I also read that it's a bad idea to fertilize a stressed plant... I'm pretty sure the worst looking plants can be considered "stressed"...

Suggestions, opinions, advice?
Thank you!