Holes can be caused by wind but they look mostly like "tears" rather than round holes. And ants can also cause them and I doubt you want the ants inside anyway. ;)

The most common cause (depending on the size and appearance) is flea beetles but I would think it is a bit early for them yet. Next most common is slugs so check the soil carefully and sprikle him with a bit of salt. Next is tomato worms (the larvae of a small moth) but you should be able to see them as well on close examination.

If they are just a few small holes, they won't hurt anything but if the problem persists, then there has to be some sort of pest there somewhere so do a very careful examination to find him.

Good luck.

Dave

The aphids are also what are attracting the ants - they milk them like cows for their honeydew.

If the problem persists after you hose them off, then mix up a soapy water solution of 1 tsp dish soap in 1 gallon of water (weaker than the normal recipe since they are seedlings) and lightly mist the leaves and soil top. Again - no exposure to light or sun until very well dried.

Hope this helps.

Dave

What kind of soap do you recommend ?
Also do you recommend Misting the plants at night so they have time to dry before the sun comes out to avoid further sunburn?
Thanks