Grow Capsicum annuum 'Serrono Del Sol' for classic serrano-style peppers with a dependable set of slender fruits. You will get the best growth and flavor when you give the plant full sun and consistently warm conditions. This pepper is frost tender and is typically grown as an annual, but in warm regions it can be carried longer or overwintered indoors with strong light.
Set plants out only after nights stay reliably warm. Choose fertile, well-drained soil amended with compost, and keep moisture steady so flowers and young fruits do not drop. Water at the base to help keep foliage drier, and mulch to reduce swings in soil moisture. Feed lightly once growth takes off, then again as flowering begins, avoiding excessive nitrogen that can delay fruiting.
At maturity, plants reach about 24-36 inches tall and perform well in beds, raised beds, and large containers. Stake or cage if fruit load is heavy. Harvest green for a traditional serrano bite, or let peppers color further for a fuller, ripened flavor. Pick regularly to encourage continued production. If you want to try overwintering, move the plant inside before cold nights, place it in the brightest spot you have, and water sparingly while growth slows.