Is it too late to plant potatoes?
Is It Too Late to Plant Potatoes
Certified GKH Gardening Expert
No, it is not too late. All potato plant varieties may be planted in March or April whether they are early season, mid season or late season potatoes. Optimal soil temperatures are 50 - 70 degrees F.
Here is an article on "when to plant potatoes":
...and an article on the different types of potatoes: