This is the classic heirloom you know and love!
These searing Serranos start green, as seen in salsas, then settle stunningly scarlet at maturity.
Serrano has its origins in the mountains in Mexico.
Peppers are the hottest when green at about 10,000-20,000 SHU

Depth 1/4"
Spacing 18"-24"
Germ Time 7-14 Days
Maturity ~75 Days