This is the second summer that I have been in my new house; two of the rosebushes are growing rapidly and appear to be flourishing leaf-wise, but have had next to no flowers. I pruned them late last fall and mulched them for the winter, and put rose fertilizer on them as soon as the snow melted for good this spring. Last year the flowers weren't particularly floriferous, but this year they're pathetic! Any ideas?
The picture below is of the larger of the two bushes - I'm not sure what variety they are, but at this point I have seen one bud turn into one flower. The other bush appears to be a grafted rose that is now about half the graft variety and half the root variety, if that could factor into the equation at all, and I've seen two buds bloom of each variety. There are no more buds on either bush.
For older roses renewal pruning needs to be done in early spring or during the growing season, should not prune past late summer, pruning in fall promotes new cane growth that lack hardiness to survive the winter.
Deadheading throughout the season promotes new growth, unless it's on a rose that only blooms once a year. Kinda hard to id what type you have, maybe you can ask for an id on the rose forum?
Do they get 6 hours of direct sun? It looks like the plant is reaching for light. The internodal spaces are large.
Did you prune it at least 50% this spring, assuming it's a bush rose and not a climber?
We are going to be digging out two roses this year, because as you so perfectly described it, they are "pathetic" when it comes to putting out blooms - lots of leaves, lots of stems, hardly any flowers.
In contrast, we have others in the same bed, down the side of the house, that put out 25-30 blooms on a stem - it all depends on the cultivar!