First, pick up a plant that has dry soil, and kinda remember that weight's feel. I agree, water the pot untill you see a little run off coming out the bottom. Then every day pick up the pots again, they should feel way heavier due to the water. When the pot feels light again like it did when you first lifted it, then it is time to water again. So basically, water untill run off, then let almost completly dry, then water again..... I hope that makes senseDepends on how your growing. When using containers I always lift, water until I see runoff, then lift again. When I plant in my raised garden bed I prefer to water using a small cup or watering can. My garden doesn't dry as fast s my containers so I can use less water. I also don't have to feed as much and never need to flush.