Is my seedling ok?

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This is my absolute first grow. Is this possibly due to overwatering?
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She looks ok, at this age they don't need much water, how much are you giving? And how often? And what's the medium?
 
Whats weird is all the other ones were not yellowish but this one
 
Whats weird is all the other ones were not yellowish but this one
If you've just watered once, you should be ok. For the next bit, you don't need to soak it, maybe 4 cups, every 3 days or so in a ring around the stem. Keep the rH up, humidity domes at this age are your friend.

Give the yellow one a couple days, it could be an issue, but more than likely she'll grow thru it.

3 to 4 days between, actually I stay pretty close to that even when the plants are larger, just increased amounts.
 
Sometimes a seedling can hit a "Hot" spot in the soil. Where the nutrients are too strong. Usually it will grow out of it. A cannabis tap root can grow 9 inches in three days and the laterals are not far behind. Your soil does look wet. :shrug:

What you need to learn about watering will come with practice. Here are the basic rules: Never let the soil dry out. Soil and or coco can become hydrophobic if allowed to dry. This means it repels water. This in turn will create dry pockets in the soil and roots there will die. If your soil - coco have accidentally dried out use a surfactant to help re-wet it. I like yucca powder. Don't let soil remain soggy by watering too much too often. Root rot, damping off, molds, fungus gnats and other problems start in soggy soil. When you do water water the entire pot. How to learn when to water starts before you plant the seed. Fill your container with fresh soil/coco and weigh it (heft it) this is the lightest weight and consider it a dry pot. Now slowly water until the soil/coco will no longer absorb the water and run-off begins; weigh the pot (heft it) this is the maximum water, the wettest the pot can get. The difference between wettest and driest is the maximum water weight, for ease of explanation lets just say the water weighs 20 pounds. When the pot loses 10 pounds (half of the water weight) it is time to water again. There is an art to watering.

:goodluck:
 
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