The University of Georgia has a great list of peach varieties that includes whether they’re cling- or freestone:
As for dwarf trees: Peach trees generally consist of one variety selected for its fruit that is grafted onto a different variety of rootstock. The rootstock is what makes the tree dwarf, semi-dwarf, or standard. So, while you could keep a normal size tree pruned smaller, it won’t be a true dwarf and it will be a constant pruning battle!
Unfortunately, lemons are one of the most cold-tender citruses; 19F might have been too cold for them. Keep a close eye on them this spring to see if they produce new foliage—it could be that some of the branches just died back but the main trunk survived.
The University of Georgia has a great list of peach varieties that includes whether they’re cling- or freestone:
As for dwarf trees: Peach trees generally consist of one variety selected for its fruit that is grafted onto a different variety of rootstock. The rootstock is what makes the tree dwarf, semi-dwarf, or standard. So, while you could keep a normal size tree pruned smaller, it won’t be a true dwarf and it will be a constant pruning battle!
Unfortunately, lemons are one of the most cold-tender citruses; 19F might have been too cold for them. Keep a close eye on them this spring to see if they produce new foliage—it could be that some of the branches just died back but the main trunk survived.