63-65 Days to maturity. Brassica rapa var. Pekinensis ‘Spring Crisp’. Spring Crisp Chinese Cabbage Hybrid seeds. Annual. Hybrid. Spring Crisp is desirable for its resistance to bolting during warm weather. With this unique trait, Spring Crisp can stay in your garden or field longer providing more to harvest. Enjoy the crisp lettuce-like cabbage-tasting leaves with a yellow center and fewer internal black specks that are common to other cultivars. You can grow it in both your spring and fall gardens as it prefers cool weather while enduring warm temperatures in areas known for short growing seasons. ~ 11,500 seeds per oz..