The two bottom oval leaves on one of my plants have started to turn yellow at the tips. What is causing this. It is only around a week old, about 2 inches tall
The natural life of a marijuana plant is causing this. Totally normal man. The initial oval-shaped leaves you speak of are called cotyledons, and will eventually shrivel and fall off your plant. Just leave it be. To be safe though, what's your setup like? Indoor/outdoor? Types of lights and total actual watts? Soil/hydro?