To slab or NFT when first true leaves are developed. Avoid direct sunlight on the plant, will bleach. Aphids, especially during warm periods.
Aphids loves Chervil.
Chervil is a low light cool temperature crop. At temperatures above 70-75 F, the plant will grow slowly and bolt to flower at an early age. Cool roots are critical to ensure good growth. Unless shade and special cooling is used, chervil is difficult to grow in the summer. It is the perfect winter crop if you can sell it.