Pest control - mosquitoes, fleas

Preventive:
Lemon basil
Catnip
Marigolds
Rosemary

To treat:
Eucalyptus oil for spiders
Borax with sugar sprinkle (1 to 3 mixture)
Neem oil with veg or coconut oil , water, dish soap spray

Thanks. I have way too many spiders it often seems, but I don't want to kill any more than I have to. I will try the other ingredients.

I have a big dog and don't want him to be affected by what I use.

We sprinkle diatomaceous earth around porches etc for ants.

"Diatomaceous earth is not poisonous; it does not have to be eaten in order to be effective. Diatomaceous earth causes insects to dry out and die by absorbing the oils and fats from the cuticle of the insect's exoskeleton. Its sharp edges are abrasive, speeding up the process."

I use diatomaceous earth for quite a few things.