I agree. You may want to wear a mask when using the potting mixes and amendments. Personally, I would only use organic ones in case the commercial ones are treated with fungicides. But organic ones may contain fungal spores. So yeah -- a mask. I don't think the tiny amount of fungicides/pesticides some non-organic seeds are treated with could be an issue.
Also don't use pesticides or herbicides while growing your plants. Stop using
weed (weed killer) n feed type lawn treatments. Be careful of neighbors who may use them while you are outside.
Do wash hands carefully and often after HANDLING any garden related supplies from the store. You don't know if they were handled with toxic chemical contaminated hands. (Just get in the habit of washing hands more often while preg.
)
Growing directly in the ground itself is not a problem as much unless you suspect neighborhood cats to have been using your garden as their potty. Taxoplasmosis should be avoided when pregnant and while babies are small.
From your list, sunflowers are really better sown directly in the ground since they don't transplant well. So far I had best success trying to get them started early by warming the ground where they are to grow and protecting with some kind of hot caps while they sprout.
