The major goals for an outdoor cut flower fertiliser program are to provide adequate levels of nutrients for vegetative growth early in development, which in turn helps to promote the growth of strong stems and encourage a consistent yield of high quality flowers throughout the cutting season. Using a drip irrigation system, a water-soluble fertiliser (e.g. 30-10-10 or 20-20-20) can be applied at every irrigation, providing a constant liquid feed. Split applications of liquid fertilisers and controlled granular fertilisers provides a more consistent supply of nutrients than one large application made at planting and comes closer to meeting the actual requirements of annuals as they develop.
Flowers: Rose, Lily & Cut Flowers - Numerica Ultra can help to suppress diseases in cut flower Rose production and has also been shown to increase bulb weight in Lily and Tulip crops.
Ornamentals - Ornamentals, including those for cut flower production will benefit from products that increase bloom size and shelf-life. Nutrical, applied at budding and repeated every 14 days will improve flower size and stem weight leading to significantly higher returns to the grower. Nurseries that are propagating young ornamental plants will benefit for applications of Numerica Ultra which will increase the plants natural resistance to diseases such as downy mildew.
For reliable flowering and early fruit set boron is an essential element. The timing of foliar sprays of Solar B or IndiPlex B is critical. Late dormant sprays (just prior to bud swell through to 20% bud break), are the most effective, later sprays effectively increase tissue levels but may not enhance current year fruit yield or quality. If flowers are under environmental stress at the time of flowering they may well fail to set flowers properly. Applications of the organic based products Joust and Compass BioActive have shown to reduce the effects of stress and so lead to increased set and subsequent higher yield. There is evidence that repeat applications of Solar K32, starting at the end of fruit set, will improve the flower quality.