She looks a little yellow. Check this out:
What Causes Cannabis Seedlings to Turn Yellow (or Show Other Symptoms)?
Poor Watering Practices - When it comes to seedlings, the most common problem is overwatering. Leaves may turn yellow if roots stay wet for long periods of time ("wet feet") and may also show a wide variety of other symptoms, spots and nutrient deficiencies. Less commonly similar symptoms can be caused by underwatering but it's more rare because small plants don't drink much. Learn how to water your cannabis plants.
Bad Soil - If soil is thick and muddy, your seedlings will grow poorly. Good cannabis soil drains well and is rich and light.
Not Enough Light - Seedlings get long and stretchy with big spaces between sets of leaves, often with yellowing. What type of grow lights are good for cannabis plants?
Too Much Light - Parts of the plant closest to the light is turning yellow or brown. Learn about light burn.
Too Hot or Dry - This can cause leaves to turn into tacos, crinkle up at the edges, and sometimes turn yellow if it gets too bad! Learn about heat stress and controlling temperatures!
Incorrect pH - If pH is too high or too low the plant may show nitrogen or other deficiencies. Learn about controlling pH to prevent nutrient deficiencies. As long as your plant is getting nutrients and doesn't appear droopy, 9/10 times the nutrient deficiency is actually being caused by the incorrect ph!
Not Enough Nutrients (rare) - If growing in soil, it's very unlikely your seedling will use up all the nutrients in the first few weeks. However, if growing in coco or hydro, it's important to give seedlings suitable nutrients from the beginning or they will immediately start turning yellow from the bottom up.
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