chong

From the looks of your plants, you do not need to cut off the leaves or portions thereof because they appear to be doing well just as it is. If they were stressing out, the leaves will themselves wilt, which apparently is not happening to your plants. In my experience, when plants are slow to grow, but look healthy as your plants are, the nighttime temperatures are dipping pretty low. The same thing is happening to my plants that are outside. The ones that are inside the greenhouse are growing 50% to 100% faster than the ones outside.

If you are so inclined, you might try building a tee-pee made of sticks tall enough and clear plastic around your plants until they are grown big enough, and the weather has warmed up sufficiently the nighttime temperatures are over 70°F.