Answer: Dill does best in full sun; it becomes leggy and prone to topple over in partial shade. It is also an annual so after it flowers and sets seeds the plant will die. It can also turn brown if it isn't getting enough water. Once it starts to die I don't think you can do anything to revive it. I'd replant new dill seeds or plants. There's still enough summer left for a new dill plant to flower and set seeds. Good luck with your plant.
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