Firecracker

Lettuce

70d to harvest

Feel the crisp snap before you even harvest—Firecracker Crisphead Lettuce forms tight, luminous heads with a lively, chartreuse-to-deep-green glow and a wonderfully crunchy bite. The leaves are thick and buoyant, holding their structure beautifully for salads and fresh plates, while their clean, sweet flavor shines in chilled bowls and vibrant garnishes. Grow Firecracker for a showpiece head that stays crisp and satisfying from garden to table.

Crop Dates

Growing note: In frost-free Zone 11a, grow this cool-season crop during the cooler dry season (October–February).

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Dec 10th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	70
Sun Requirements	Part Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	45
Min Soil Temp (°F)	40
Min Night Temp (°F)	32
Harden Off (days)	6

Frequently Asked Questions

What’s the most common pest or disease issue for Lactuca sativa (lettuce) like Firecracker, and how do I treat it?

For lettuce, one of the most common problems is aphids, which cluster on tender leaf undersides and weaken plants. Spray a strong jet of water to knock aphids off, then apply insecticidal soap directly on the undersides and repeat every 5–7 days until new growth is free of aphids. If you see silvery speckling and leaf scarring from thrips, remove heavily affected leaves and keep weeds down around the bed to reduce breeding sites.

How often should I water Firecracker lettuce during its main growing phase?

Keep the soil consistently evenly moist from transplanting/establishment until harvest—lettuce roots prefer a damp but not soggy bed. Water deeply about 1–2 times per week depending on heat, aiming for the top few inches to stay moist; in hot weather, you may need more frequent watering to prevent dryness-triggered bitterness. Avoid letting soil dry out completely, which can cause stress, slow growth, and faster bolting.

How can I tell when Firecracker lettuce is ready to harvest?

Harvest when heads/rosettes are fully formed for the variety, typically around 70 days after sowing, and the leaves should feel crisp and reach their expected size. Look for a firm center (or well-developed rosette) and avoid waiting until leaves start to get noticeably loose or elongated. For best flavor, cut in the morning and harvest before the plant bolts (when the center rapidly stretches and flowers begin forming).