![]() Field: N min soil value: approximately 120 g N/m². The roots are sensitive to high salt levels in substrates. Prevent magnesium deficiency by applying magnesium sulphate (0,05 %) 1-2 times and in case of iron deficiency apply iron-chelate for 1-2 times. Stems that are too soft will break underneath the flower. Avoid high ammonium and high nitrogen levels, but high nitrogen levels results in soft stems. Fertilize the crop weekly with 100-150 ppm nitrogen, using complete balanced fertilizer. ![]() Moderate fertilization levels are required. In field Zinnia prefers warm and sunny location. It is recommended to harden for selling the plants slowly at 12-14 ☌. Four-week-old seedlings were transplanted from plug trays into pots containing soilless substrate amended with an aqueous solution of 1. Zinnia does tolerate high temperatures of 25 ☌, but does not tolerate frost. Humectant treatment and substrate moisture content (SMC) were studied to determine their impact on post-transplant water utilization in ‘Thumbelina zinnia (Zinnia elegans Jacq.). emperatures below 10 ☌ promote yellow leaves. If you live in the northern climates, it is advisable to start zinnias seeds indoors at least 3 to 4 weeks before the spring under bright lights. This flower grows fast from germination to maturity in 8 to 12 weeks however, it depends on the cultivar. Youll see seedlings sprout in four to seven. Planting zinnia seeds or seedlings must start at the last date of the frost date. Standard fertilization: 80-100 g/m² of a slow release fertilizer. Where spring warms up early, wait until the last frost has passed before directly sowing zinnia seeds outside. Disinfect the soils in greenhouse or polytunnel before planting. Field: loamy, sandy, humus soils with good drainage. Use a well-drained, growing perennial substrate with 15-30 % clay, 1-1,5 kg/m³ complete balanced fertilizer, iron-chelate, micronutrients, pH: 5.8-6.2. For cut flower production, thin seedlings or plant plugs at 8-10" (20-25 cm) in rows or 9-12" x 12" (23-30 cm x 30 cm) spacing in beds. Use of calcium nitrate will improve stem strength. Fertilize weekly at 200 ppm nitrogen in a well-balanced mix. Temperatures below 60 ☏ (15 ☌) delays flowering. Sow seeds in a well-drained media low in nutrients with a pH between 5.8-6.2. Higher temperatures can reduce germination and cause week seedlings. Indoor forcing: February-March for flowering in pots from July onwards Outdoor forcing (frost free): End May, can be sown directly into field Sowing methodħ-10 days at 68-72 ☏ (20-22 ☌). Plants for bedding, pot plants, beautiful plants, that attract bees and butterflies, cut flower production Sow time
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