Q&A for How to Build a Mason Jar Herb Garden

Yes. Clay pebbles usually soak up a little water, so you might not have to water it as frequently.

No, the egg carton is too small for the herbs to develop roots, unless you are talking about huge goose or mango cartons. The mango/goose egg carton is might hold them in a neat tray, which might be good until the roots get to wide and need a big mason jar to grow in. Then, you can transplant them with care to a big mason jar.

Yes, because the stem won't be able to stick itself into the soil. Alternatively, you can poke a hole with a skewer or stick and put the seed into the hole. When you are done throwing the seeds into the hole, bury the hole and water it a little.

Yes. In fact, the different sizes of seashells will actually absorb more water than pebbles, so that the roots have an even smaller chance of rotting.