Growing spring vegetables

Despite the cool, wet weather, the spring vegetables were done by early July. The snap peas grew so tall they toppled over. The lettuce, mesclun and mache went to seed.

We've pulled the first round of carrots planted April 5th and ready from 11-13 weeks. There is a second crop of carrots still growing.

I've pulled the snap peas and lettuces. I've replaced the mache with parsnips planted July 3rd, and the snap peas with swiss chard. I'm leaving the lettuce section free to replant with lettuce in late August.

What's eating the mustard?

After further investigation and consultation, it seems very unlikely that ants would be devouring the roots of my mustard green. (Not sure what the ants would be doing swarming in and out of the roots.) But the root damage combined with the little holes in the leaves of the mustard point to flea beetles as the culprit.
These can be a big problem and may get into other plants (like the eggplant) once they're done with the mustard.
There are options for controlling them, including diatomaceous earth, which absorbs lipids from the exoskeleton causing the critters to dehydrate. (It's also useful for removing DNA). That link there is about all I know about diatomaceous earth.
Will see how this infestation progresses before taking chemical intervention.

Ants in the Mesclun

After finding the grubs all over the chard, I assumed I would find them on the big mustard greens that were already dwarfing the rest of the mesclun greens. Instead on the mustard greens, I found ants. The dirt around them was teeming with little brown ants. They were boring in and out of the root. Not sure if I can do anything about them. In any case, the nearby lettuces do not seem to be affected.

Spinach at 5 weeks