Effect of planting time and density on growth and bulb production in tulip cv. Apeldoorn

Trial with four plating dates (16 and 31 October, 15 and 30 November) and four planting densities (30, 40, 50 and 60 bulbs of 8–9 cm circumference m⁻²) was conducted on growth and bulb/bulblet production in garden tulip cv. Apeldoorn. Planting bulbs on 15 November, recorded maximum bulb yield in terms of number (50.50 m⁻²) and weight (0.95 kg m⁻²) immediately followed by 31 October, recording 47.88 bulbs and 0.93 kg m⁻². However, number and weight m⁻² of bulblets was maximum with November 30 planting. Planting density of 60 m⁻² recorded significantly more bulb number and bulb weight (1.12 kg m⁻²) over lower densities of 30, 40 and 50 bulbs m⁻².