(Note that seeds that rest on the surface of the soil may require light to germinate as well as heat. Oxygen: Another essential condition is the aeration of the soil. then, they would need light. 6 Answers. 6. Do Seeds need Soil and Light to Sprout? Marijuana seeds need the following to get the best germination rates: Moisture – Keep things moist but not soaking (you can soak hard seeds for up to 24-32 hours, but do not leave seeds soaking in water for longer than that). Circle your hypothesis. Seeds that require light to germinate are lettuce and savory. T&M's former Technical Manager, David Batty, investigates these questions and discusses the question of whether seedlings need light. Some seeds require light to generate, and often need to be placed on the soil surface or just under a dusting of soil. Covering the seeds with a fine sprinkling of vermiculite or sand or other fine material helps to retain moisture for the very fine seeds and is a common practice and is okay for seeds that need light. Of course, you will find the light requirements for all flowers or vegetables on the back of their packets. Peace – Seeds need to be left alone while you’re waiting for the taproot to show up. Seed pots. However, that doesn't necessarily mean that they need light. 1 decade ago. Lakedust, It means that the seeds shouldn't be covered and that they do in fact need a certain amount of light to stimulate germination. You need to do this for about 3-4 hours before you’re going to plant the seeds. Some need exposure to light while other germinate in darkness. I think we will have to try this one too! These tiny seeds don’t contain sufficient energy to dig their way through dense soil, and some actually require light to germinate.. Why won’t my seeds germinate? These seeds should not be covered with soil or just barely. The seeds from these plants are usually very small and naturally, drop from spent flowers or drop to the soil in rotting fruits. Find a bowl and fill it with water so you can soak your seeds in it. If you’re growing indoors on a windowsill, be sure to place pots in a warm, sunny spot that gets a good amount of natural light. There are lots of methods for seed germination, and you can experiment to see which works best for you. Do seeds need light to germinate? Seeds That Need Light to Germinate. So with this information, how would we answer our question “Do seeds need light … It appears that access to light is what tells the seed it has reached the surface and can now produce leaves. Potting mix. Seed A and seed B were perfectly fine without light. I learned this in 5th grade and have allways used this method because they germinate faster. Correct light levels – some seeds require light to germinate, but many don’t and in some cases light can prevent germination. Seeds reflect this in how they germinate. Just take the cover off and rely on the growing medium to supply the moisture needed (with your help), not the air. they obtain the energy require in the seed itself during germination, until their first leaf appear. You get better seedlings by growing them under light. Although sunlight is required for Radish seeds to grow, it is not needed for them to germinate. Some seeds do require light to germinate, some require darkness and some don’t care. Remember that a controlled experiment keeps everything the same except what is being tested. What Do Marijuana Seeds Need to Germinate? What you need to germinate seeds. Some seeds need light. Otherwise, you can supplement with a fluorescent grow light to increase hours of light. Click Clear trays. Seeds germinate the best in temperatures between 60 and 75 degrees Fahrenheit. 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