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do weed seeds need sunlight to grow

To germinate seeds this way, lay one paper towel on top of a countertop, place a few seeds, and cover them with a second paper towel.

To germinate seeds indoors, use any of the methods described above. Within a few days, you’ll have popped seeds ready to transfer to a growing medium.

When a seed enters an environment with enough moisture, it will increase in size and slowly break out of its shell. A seedling or germ forms from which roots will emerge, helping the baby plant absorb nutrients from the soil. Seeds naturally develop roots facing down and stems stretching upward, allowing the young cannabis plant to simultaneously feed off light and earth.

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You can also germinate your seeds by placing them in water. It’s slightly faster than the soil method, but you need to adjust your environmental factors accordingly. Remember, successfully germinating seeds requires a perfect balance of ideal growing conditions. When germinating in water, seeds need only 24-48 hours to pop their stems, though cultivators can keep them soaking for up to a week as needed. Water germination is faster because the seed gets all the moisture it needs immediately, and the shell softens and cracks more easily after soaking.

To employ water germination, fill a glass with tap water and let it sit until it reaches room temperature or around 65 degrees Fahrenheit. Add two to three plant seeds per cup and allow them to sit, watching for any changes. Change the water to fresh tap water every two days, making sure it stays at room temperature.

Place the soil in a small pot and use your finger or a pencil to push a small hole in the dirt, a bit more than half an inch deep. Insert the seed into the hole and bury it with soil. From this point on, don’t touch your seed. The young plant is fragile and knows how to position itself in the soil bed.

The paper towel method is also a common way cultivators pop their seeds. Some even use this method with cotton pads instead of paper towels, but the necessary steps are the same.


Given the Earth’s orbit, its poles tilt toward the sun during different times of the year; the Northern Hemisphere is closest to the sun on the June solstice, while the Southern Hemisphere is closest to the sun during the December solstice. The closer a pole is to the sun, the more direct sunlight it receives, and the longer the days in the corresponding hemisphere.

Why Does Cannabis Need Sunlight?

That’s where indoor growing really shines; not only does it allow you to run really private grows, but growing under lights also has the added benefit of giving you a lot more control over your plant’s environment and light cycle.

While cannabis may have its roots in Asia, the plant has managed to spread and adapt (thanks to the help of humans) to almost every corner of the globe. Varieties that have adapted to the unique climate and light cycle of the tropics and equator typically germinate much earlier than those adapted to grow further north or south. They may also stay in veg much longer, and even continue developing foliage as they flower, leading them to produce elongated and airy buds.

Growers in the Southern Hemisphere, on the other hand, might kick off their grows as early as September, and will typically harvest between March or May, although some sativas might be ready by early June (depending on the genetics and the local climate).