It depends on the quality or strain of your seed..If its bagseeds then it can just pop up any time.. Sometimes It takes a day if your working with some good seeds.. Sometimes it takes like a week..Just make sure the seed is cracked.. Sometimes to incourage the growth.Very very carefully when the seed is cracked Very gentle lift one side off to pick off the half of the shell. I did this once an it worked but be very carefull cause you can damage the plant it's self..