yeah , basically, my mate grew some potent skunk last year and he was ashing in the plants soil. so i have been doing this aswell, from when the plant was a seedling. even cigarette ash goes in their and it doesnt mind!
i think this is because ash holds certain periodic nutrients and/or minerals that break down in the soil. it is a natural thing (from burnt trees in the forset which give nutrients to the soil) and ash from a joint also happens to be good for my plant! you should try it if you cant find your ash tray, the pot is an ashtray itself!

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M.I.T.S

i wouldnt fuck with it.. maybe its good though.. i smoke bud around mine now and then but i try not to smoke ciggarettes around them.. then again maybe the co2 in ciggarette smoke could help them out..

from what i seen on the fourms ash's hold alot of nitrogen, but cig ash im not to sure if it good for your plant, tobacco is poisonous, unless boiled first, and made into juice to spray over the plants, good for killing those pesky spidermites. but i could be wrong im a newbie, maybe tabacco changes when it turns into ash, or hold the same properties. well enyways KEEP GROWIN ON.

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I choose the way i live !!

Anything i say/post on this fourms is purely fictional......im psychotic and have no ideal what im saying, i do not use/grow marijuana in eny type of form or way.

Ash can create an acidic solution... If I remember correctly from my childhood history classes ... If you mix Ash with water you get something called "Lye". You mix lye with fat to make soap, this soap is based on the caustic properties.

See from wikipedia: "Lye is a caustic solution which is made from ashes and is used for glass, soap making, and certain food preparations and may refer"
(direct link: Lye - Wikipedia, the free encyclopedia)