It looks like the seedling you have is exhibiting some abnormal growth, possibly due to a mutation or stress during germination. Here are a few things you could consider:
Wait and Watch: Sometimes, seedlings can recover from initial stress or mutation and develop into healthy plants. You could give it some more time to see if it starts to grow normally. Keep providing it with proper care, including appropriate light, water, and nutrients.
Replace: If the seedling shows no signs of improvement after a few more days or if its condition worsens, you may want to consider replacing it with a new seed. This would ensure that you have a healthy plant to work with and maximize your chances of success.
Isolate: If you decide to keep the mutant seedling, consider isolating it from your other plants. This is to prevent any potential issues from spreading to the healthy plants.
Identify Potential Causes: Reflect on the germination process and growing conditions to identify any potential causes of stress that may have led to the mutation. Ensure that future germinations are done under optimal conditions to minimize the risk of mutations.
Continue Monitoring: Keep a close eye on the mutant seedling's growth and development. If it continues to exhibit abnormal growth patterns or fails to thrive, you may need to make a decision about whether to keep it or replace it.
In summary, whether you choose to keep the mutant seedling or replace it depends on your patience, resources, and goals for your grow. If you have spare seeds and are concerned about the mutant seedling's viability, replacing it might be the best option. However, if you're willing to give it some more time and care, it's possible it could still develop into a healthy plant.