Buttercrunch

Buttercrunch lettuce (Lactuca sativa) is a popular, award-winning butterhead variety recognized for its 4-to-5-inch compact, rosette-shaped heads with thick, crisp, dark green outer leaves and a creamy yellow, tender heart. Known for its mild, sweet flavor, high heat tolerance, and slow-to-bolt nature, it matures in 60-70 days and thrives in full sun, making it ideal for spring and fall gardens. 
Key Characteristics and Growth
Appearance: Forms small to medium, loose, open, or compact, vase-shaped heads. Leaves are thick, succulent, and slightly crinkled.
Flavor & Texture: Renowned for a buttery, crisp texture and mild, sweet taste that does not easily become bitter, even in warmer weather.
Size: Heads typically grow 4–6 inches, though some may reach up to 8–12 inches, with a spread of about 6 inches.
Heat Tolerance: Known for being less likely to bolt (go to seed) in high temperatures compared to other lettuces.
Growth Rate: Fast-growing annual, often ready for harvest in 60–70 days. 
Cultivation Tips
Planting: Prefers full sun but can handle partial shade, especially in warmer climates. Space plants about 8-12 inches apart.
Soil: Thrives in fertile, well-drained soil with a pH between 6.0 and 7.0.
Harvesting: Best harvested by cutting the entire head at the base, although individual outer leaves can be removed for a "cut-and-come-again" approach. For best flavor, pick just before meals.
Buttercrunch is an excellent, reliable choice for home gardeners looking for a dependable, high-quality, and heat-resistant butterhead lettuce.