Q. So how many green potatoes would it take to kill me?
A. What a morbid question. Luckily the answer is too many.
To stand a chance of dying from Solanine* poisoning you would have to eat between 1 and 2 kilos of green potatoes in one sitting.
If the bitter taste and burning sensation in your mouth and throat doesn't stop you then your overstretched stomach probably will.
* Solanine. Toxic alkaloid found in the Solanaceae family (potatoes, tomatoes, peppers, aubergines, tobacco and deadly nightshade)