Yellowa

Technical Profile of the Yellowa Hybrid

The 'Yellowa' tulip is classified as an Early Double variety. Breeding efforts for this cultivar focused on structural stability combined with a low-growth habit. Unlike standard tall-stemmed tulips, 'Yellowa' features a shortened peduncle, which prevents lodging under the weight of the dense, double flower—a critical mechanical design feature for commercial floral production and container gardening.

Biological Defense and Immunity

The genetic map of this hybrid includes markers for increased resistance to common bulb pathogens. In greenhouse environments characterized by high humidity, 'Yellowa' demonstrates significant resilience against powdery mildew and downy mildew (peronosporosis). The reduced requirement for intensive chemical treatments throughout the growth cycle makes this cultivar a sustainable choice for integrated pest management (IPM) protocols.

Flowering and Agronomic Features

As a mid-season flowering variety, 'Yellowa' effectively bridges the gap between early-spring forcing and late-season groups. The yellow pigment density is exceptionally high, ensuring consistent color saturation even under suboptimal lighting conditions. The double-flower structure is achieved via the metamorphosis of stamens into petaloid tissue, which technically extends the bloom's lifespan by regulating transpiration rates.

• Class: Early Double.
• Resistance: High resistance to fungal diseases.
• Growth Habit: Compact, low-growing.
• Color: Intense yellow.