Scorch
SCORCH, verb transitive
1. To burn superficially; to subject to a degree of heat that changes the color of a thing, or both the color and texture of the surface. Fire will scorch linen or cotton very speedily in extremely cold weather.
2. To burn; to affect painfully with heat. Scorched with the burning sun or burning sands of Africa.
SCORCH, verb intransitive To be burnt on the surface; to be parched; to be dried up.
Scatter a little mungy straw and fern among your seedlings, to prevent the roots from scorching.