![]() Maintain light levels up to 7,000 foot candles/75,000 lux, while watching for heat and water stress. Reduce temperatures into the low 60’s and continue to provide good air movement to assist in establishing well-toned plugs. Ideally, viola trays should be given higher light levels to control stretch. Always monitor the soil pH and maintain levels between 5.5 and 5.9. When applying fresh water (no fertilizer), continue to supplement with trace elements, especially boron. Reduce fertilizer applications as the plants begin to bulk up and fill out the trays. A calcium nitrate-based blend such as 15-3-20, works very well to build strong, compact plants. After the initial feed, begin fertilizing with 100 – 200 ppm N from a well-balanced fertilizer containing trace elements. Maintaining temperatures in the low to mid 60’s with good air-flow will greatly assist in keeping plugs compact and well-toned. To avoid this, supplement with Solubor or Borax with a target of boron at 0.25 ppm added to the stock tank. Boron deficiency can occur, especially during the summer months, resulting in tip abortion.
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