Seeds normally come in a pack of 5. You should plant all of them at the same time and you will notice not all of them grow equally. This is because they all have different genes even though they are the same strain. The reason we plant all 5 seeds at the same time is to determine which one has the best genetics and that is the one we will use for our mother plant. The rest can be set to flower or used accordingly but the one with the best genetics will stay in vegetative state for many clones to come.