Pot

The punishment would depend on how much marijuana was allegedly possessed and if you have any prior record. Marijuana is a Schedule 1 controlled substance. Knowing possession of forty grams or less of marihuana is a misdemeanor. But if you manufacture(i.e. GROW IT!), deliver, or possess marijuana with intent to manufacture or deliver marijuana, it is a Class C felony. If it is possessed for commercial purposes, and the amount possessed is five or more plants or one pound or more of marijuana, and a substantial nexus exists between the possession of marijuana and the real property then real property can be confiscated.
Don't forget that Washington Law has provisions for citizens with certain medical disabilities to possess a 60-day supply of pot LEGALLY with a Doctor's authorization.

While Mr. Clark's answer is correct, there is one important thing to note; it does not matter under the statute whether one intends to "sell" the pot or not, merely that one intends to "deliver" it. So, if you're turning your friends on for free and not taking any money in exchange, the criminal charge remains the same, although the civil forfeiture penalties described by Mr. Clark would kick in if there is evidence that it is a commercial operation.