I usually start chile in trays and plant on June 1st here in Denver.
For whatever reason, I can't stop the seedlings from getting leggy and
soft, so when the first really hot spell comes along, usually a week
after I plant, I always lose about 25% of the seedlings because
they're just not tough enough. I work away from home and am unable to
harden them off properly because, around here, the mild days of Spring
last around 18 hours.

So this year I thought I'd seed right in the ground so the plants grow
up tough, but when to set them in? May 1st? This year I'll be planting
Anaheim, maybe some New Mexican 6-4, and Chimayo. (The Chimayo seed,
from a ristra we bought from a woman in Chimayo, is eight years old
this season. Last year I got 80+% germination in a sprouting box at 95
degrees.)