if you have old seeds use the seed soak method with a boost, buy a bag of tomato seeds (actually any seed will do) and soak them in a few ounces of water for 24 hours, then strain them out and put your mj seeds in the water that you just brewed for 12 hours, what you want is your mj seeds to sink if after 12 hours they don't tap them (to eliminate air bubbles) if they sink they should sprout
the why, all seeds have similar hormones, enzymes and nutes built into them to help them get started by soaking them in this seed brew you re-juvinate them with what they need to thrive