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Pansy

Pansy. Dr. Terri W. Starman HORT 429 Greenhouse Crop Production. Pansy. Viola X wittrockiana Hybrid origin Bedding plant Hundreds of cultivars 3 Groups based on flower size in inches: 1.5-2.5 2.5-3.5 3.5-4.5. Viola. Johnny-jump-up Viola tricolor

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Pansy

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  1. Pansy Dr. Terri W. Starman HORT 429 Greenhouse Crop Production

  2. Pansy • Viola X wittrockiana • Hybrid origin • Bedding plant • Hundreds of cultivars • 3 Groups based on flower size in inches: • 1.5-2.5 • 2.5-3.5 • 3.5-4.5

  3. Viola • Johnny-jump-up • Viola tricolor • European origin naturalized in North America • Bedding plant • 0.75-inch flower • Yellow, purple-red, violet-blue, white

  4. Propagation • Seed • Germinate in the dark • 60-64% germination at 65-750F • Use primed seed in hot weather • Violas like night temperature ≤ 600F

  5. Flowering Control • Long day decreases days to flower • LD increases flower number and internode length • Night interruption increases height • Short day produces short, sturdy stems • High summer temperatures limit flowering by causing a decline in vigor

  6. Temperature, Light, Water • 40 to 550F after root establishment • >600F growth is weak and internodes elongate • Use full light unless shade is needed to reduce temperature • Supplemental HID decreases days to flower and increases flower number • Never allow to be water stressed

  7. Nutrition • Moderate to low feeder • 100 ppm N is sufficient • Use only nitrate N • B and Ca deficiency cause cupping & distortion of new foliage • pH 5.5-6.0 • If >6.0 or too much Ca = B dificiency • <5.5 = Ca deficiency or Fe & Mn toxicity = rusty mottling on foliage

  8. Height Reduction • Not needed if cool and high light • Bonzi @2-25 ppm • Sumagic @ 2-15 ppm • Bnine @ 2500 ppm • DIF • Water stress

  9. Insects, Diseases & Physiological Disorders • Aphids and thrips • Damping off • Leaf spot • Botrytis • Root and crown root • Insufficient flower size due to high temperature and/or late application of growth retardants

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