mancorn said:

Your stem appears to be completely white. Prop it up with a paper clip and add additional soil. Unless it has damping-off disease (which would be fairly obvious with a dark stem at the soil line) it will be fine.

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Ninjadogma said:

If I can suggest a different method of watering your seedling.... use an eye dropper and put the water in at a distance from the stem that's approximate to the length of the leaves around it. Add enough so the moisture wickers inward to the stem instead if making it wet at the base. This promotes root growth and helps prevent damping off, which eats away at the wall structure of the stem until it gives out and collapses.

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Ninjadogma said:

Not sure it's damping off, but could be a week stem from overwatering, or just a side observation, I see outdoor plantings of all kinds do this from time to time and not just cannabis... they are fine, they are hydraded and then around middle of the afternoon they poop out. And my best guess (just a guess) is that the sunlight evaporates the water out of the stem at a rate faster than the baby roots can replenish it and it just gives out. They can recover if you get them out of the light and let them recover. If it's Pythium they don't usually recover because the cell walls are damaged.

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Ninjadogma said:

Not sure it's damping off, but could be a week stem from overwatering, or just a side observation, I see outdoor plantings of all kinds do this from time to time and not just cannabis... they are fine, they are hydraded and then around middle of the afternoon they poop out. And my best guess (just a guess) is that the sunlight evaporates the water out of the stem at a rate faster than the baby roots can replenish it and it just gives out. They can recover if you get them out of the light and let them recover. If it's Pythium they don't usually recover because the cell walls are damaged.

Click to expand...