New grower . is this normal?

ok so my plants are about three weeks old im using fox farm happy frog ocean forest mix .my plants been doing fine then yesterday i noticed my first set of leaves are turning yellow and looks like they are dying.here are some pics.any ideas whats causing this?

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That’s normal. Its from where the leaves set on the wet soil

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From touching the soil. Nothing to worry about. You’ll be removing those soon anyway. You can see the same thing here.

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Great advice above