Does anyone know why one side of my garden would grow faster than the other side?

On the right side, the plants (most of them) are still living.  The iceberg lettuce and red bell pepper plants in the middle look slightly bigger than when we first planted them, but I feel like they’re still hesitant to make themselves at home.

The parsley in the lower-right corner doesn’t look too bad, but the basil in the upper-right corner doesn’t seem to be in much of a hurry to do anything at all.

Now take a look at the left side:

Check out that basil in the upper-left corner!  Same type as the basil in the upper-right corner, but it’s growing much, much faster.

And see how much bigger the green bell peppers in the middle are compared to the red bell peppers on the right side?

Is this some sort of conspiracy?

Same thing with the tomatoes.

I have arugula and romaine lettuce on the left side.  It appears to be thriving.

Especially compared to these piddly little iceberg greens on the right.

Could this have something to do with the fact that I’m left-handed?

This is seriously flabbergasting, people.

Same amount of sun, same amount of water.

I. Don’t. Get. it.

Help!