u/2d12Necrotic

My wife requested a raised bed for a few plants with an arch for loofahs (also new to planting loofah), but today, three days after transplanting healthy green sprouts, the loofah leaves look yellow and burnt.

Think this is just stress from the move, or are they too close to the sides of the bed and getting too hot from the sun on the metal?

For reference, I have a layer of loose rocks at the very bottom, a good bed of fallen sticks/twigs, covered by a few bags of Black Kow raised bed soil.