![]() Make sure that the media you use drains easily. This means to increase the time between watering. To make sure that your seedlings are not too wet you need to reduce watering. Algae should not be a problem if you give the seedlings enough air movement, nutrients, and adequate light.Īlgae can also be caused by high moisture, which occurs from over-watering. ![]() When you have the right growing conditions, they will grow tall enough to shade out the top of the crowns so the algae will not be able to grow there. To accomplish this, use the seedlings to shade out the algae. When adjusting the light, you want to keep the light levels high enough to keep the seedlings growing but then you want to decrease it to prevent algae from growing. The bad thing is that for seedling growth light is necessary. It can be easily controlled if you limit the light that shines on the growing substrate. No matter if it is a small or large hydroponic system, algae can be a problem. It may also be a bloom of green, brownish, or pink sticky material that sprawls across the soil surface. Algae: This is usually a green slim on the top of the seedlings.They usually form a fuzzy-looking mass on top of the plugs or crowns Mold: This will be evident from the fruiting bodies. ![]() The crown is where the stem meets the media. If your seedlings have mold or algae, it can become an issue that can be bad enough to keep the crown of the seedling moist, encouraging plant disease or smother the seedling. What should you do? Should you treat this? Should you throw away the seedlings away and start over? Should you try to transplant them in new soil and let them continue to mature? This means they have fruiting bodies or a green film. ![]() You have two weeks before you can transplant your seedlings outside and one day you notice that the top of the plugs is covered in mold and algae. ![]()
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