Patience. You've fed them well and kept them watered and they are growing and blooming so all you can do is wait for them to recover from the winter. This is going to be a regrowing year for a lot of roses. Come fall do not prune them at all before winter. Leave them with as much cane as possible to start out with next spring. Hopefully winter will not be as severe as the last one and they will start out bigger and healthier for next season. Next spring only prune off dead cane and leave them as tall as you can.

Is there enough sun?

Its been hot as blazes in the northern Virginia/DC area (s'posed to be 97 today). I've been watering every third day (with clay soil) and it isn't enough to push new growth, I"m just keeping them alive. Try watering every second or third day, the results may surprise you.

Hybrid teas are best left to zones like California lesson learned I shovel pruned most of mine after years of disappointment due to winter die back and planted winter hardy shrubs

Unless you want to win HT Queen, hybrid teas aren't the best roses for your area. It takes skill, luck, and a mindset that enjoys replacing roses early and often. There are reasons the northeast considers HTs to be zone 7 plants. A big one being that their performance much into zone 6 isn't very good.

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These are not hybrid teas in a public garden near the Hudson River in zone 6a. They were planted last spring, and the picture was taken by somebody else a couple of weeks ago. These not hybrid teas were not winter protected. They also have not been watered, and the only fertilizer is some granular stuff sprinkled around. Next year, I am probably going to have to teach people to prune because we will be into that local unknown, pruning for size.

And Diane, if you are reading this, yes, those are the Fairy Tales. The red roses in the middle are polyanthas that have been around for about 15 years, but the others are that Fairy Tale order.

My HT's have been really slow to regrow this year also, due to a long, very cold winter, cool spring & a cooler than normal summer so far. Floribundas, OGR's & shrub roses are the only roses doing well so far in my z4 area.