If you're looking to grow your own marijuana or cannabis seeds, you'll need to start with a healthy seedling. While there are many different varieties of marijuana available, all seedlings start out the same—with a single shoot emerging from the seed. To ensure that you're growing seeds that will produce plants that are free of pests and disease, be sure to start your seedlings indoors as soon as possible.
Like many plants, marijuana seeds need to go through several stages of growth before they're ready to be planted in the garden. Once your seedling has emerged from the soil, keep it well-watered until it's mature enough to transplant outdoors. When planting in pots, make sure that they're deep enough so that the root system doesn't dry out. Remember that marijuana plants need full sun exposure to grow best, so it's important to choose a spot where they can get at least six hours of direct sunlight each day.
Once your seedling is big enough for transplanting, take care not to damage its roots when transplanting it into the garden. Make sure that you plant it in a spot with plenty of room for its roots to spread out and strong support structures like stakes and trellises. You'll also want to make sure that the soil is well-drained and well-fertilized with a balanced mix of compost, fertilizer and water.

Source: https://weedseeds.garden