cut about a inch above the dirt, if your going to dry it hang it upside down
How do you kill Japanese beetles on your herbs? Can you use Sevin dust?
These articles should help: https://www.gardeningknowhow.com/plant-problems/pests/insects/japanese-beetle-resistant-plants.htm
Is there an herb that repels wasps?
Both Tansy and Wormwood are considered general insect repellents and will repel wasps.
How to use zine for tea garden.
I think this may be what you are looking for:
It doesn't matter what brand of multi-use I buy, I get tiny black flies which seem to live in the soil. I have herbs along my kitchen windows which are infested. What can I do to stop this happening?
It sounds like you have fungus gnats. This article will help: https://www.gardeningknowhow.com/special/children/fungus-gnats.htm
Neem oil will help take care of these pests but will not hurt the plants. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
They are starting to flower and my question is, is this where I would get the seeds from to start new plants?
Yes, if the flowers are pollinated, you should have seed. However, I have found it easier and quicker to propagate most herbs by cuttings rather than by seed. Chives will need to be divided or sown from seed. Dill will have to bre sown from seed. I take a 3-4" cutting (new wood that has hardened off a little, not tender), strip bottom leaves and insert into moist peatlite commercial potting mix. Make a "greenhouse" with pencils, sticks or plastic knives and very thin clear plastic like food wrap or a drycleaner bag. The pencils, ect. will hold the plastic over your cuttings to hold in humidity. Do not keep cuttings soppy wet, but not too dry either, just evenly moist, and mist daily. Do not set this in the sun, you don't want to cook them. Depending on the herb, and temperature, you could see roots in a week or two.
Where near Tacoma can I purchase starts for an herb garden or tea plants that will stay in a patio garden?
A local search online or trip to the garden center can normally yield good results, as these plants aren't difficult to find. For more information on tea garden and suitable plant, these articles will help: https://www.gardeningknowhow.com/edible/herbs/hgen/tea-plants-for-garden.htm, https://www.gardeningknowhow.com/edible/herbs/hgen/herbal-tea-plants.htm