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Environmental conditions

Environmental conditions. Plants. 50 seeds of each cultivar were sown in plug trays (200 cells) containing PGX seedling substrate ( Premier Horticulture, Rivière-du- Loup,Quebec ) .

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Environmental conditions

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  1. Environmental conditions

  2. Plants • 50 seeds of each cultivar were sown in plug trays (200 cells) containing PGX seedling substrate (Premier Horticulture, Rivière-du-Loup,Quebec). • When plants reached the 3 to 4 leaf stage, they were transplanted into 36, 24 or 18-cell trays (ITML Horticultural Products) containing Sunshine Mix 1 (Sungrow Horticulture). • Cuttings supplied as plugs were transplanted into 10 cm pots. Cuttings already in 10 cm pots were placed in the greenhouse.

  3. Fertilization • Plants were fertilized once a day according to stage of development. • Before transplanting (seedlings): 50 ppm of nitrogen from 14-0-14 or 50 ppm of nitrogen from 20-8-20 on an alternating basis. Plants were also watered according to need at the end of the day. • After transplanting and vegetative stage: 200 ppm of nitrogen from 20-8-20 (twice a week). The pH of irrigation water was always adjusted to 6 with phosphoric acid.

  4. Cultural practices • Plants were transplanted into ground beds between 10 June and 17 June. • Several days before planting, soil was rotor tilled in the beds. • Compost was added in each bed, with the volume applied depending on the initial height of the soil. • A slow release fertilizer was added to beds • 1.5 kg / m2Acer 13-12-12 (3-month slow release). • Hanging baskets were fertilized with a slow release fertilizer (60 g of Acer 13-12-12 ). On July 9, plants were fertilized with 250 ppm of nitrogen from 15-30-15. On July 30, plants were fertilized with 400 ppm of nitrogen from 20-8-20 . The pH of irrigation water was always adjusted to 6 with phosphoric acid. • Plants were watered according to need which was evaluated on a daily basis. Frequency depended on climatic conditions.

  5. Performance of cultivars • Cultivars were evaluated on a scale of 1 to 5. Data is shown graphically: • Plants dead • 2. Poor performance • Few flowers (10 to 20%) • Foliage damaged by disease, insects • Little tolerance of climatic conditions • 3. Good performance • Flowering (30 à 60%) • Plants not uniform • Slight foliage damage • 4. Very good performance • Flowering (70 to 80%) • No foliage damage • Slight lack of uniformity • 5. Excellent performance • Flowering 80 to 100% • Plants very uniform • Exceptional growth, foliage without damage Flowering % wasrecorded. A second graphic shows the evolution of the % of floweringthroughout the season.

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