Roses are heavy feeders and respond quickly to an increase in care. From pruning time, you need to start feeding; the more the better, but as it can become pricey if you have many roses, even some of the following is better than nothing. We work on a fortnightly cycle of alternating applications of a balanced part organic fertiliser (e.g. 9:7:8) with an application of “Sudden Impact” two weeks later. Apply 150g fertiliser per plant spread over the root zone of the plant and water in well. Watering is crucial for success – 20 litres per plant per week is the norm. Each site is different, so watch your roses and if they are doing poorly, adjust your watering accordingly. Regarding spraying, Efekto “Rosecare” is the easiest, but can prove costly on a large scale. Use Garden Ripcord or Malathion for aphids and hoppers, Carbaspray for beetles and Dithane M45 or Bravo for fungal troubles. A fortnightly application will stem any major issues, but this rate can be adjusted to suit your tolerance of damage on the plants. Lastly, a fortnightly application of liquid manure will really be ideal to get your roses looking their best. There are many different brands. We use Canyon’s Maximarinure. It is organic and yet has a sufficiently low particulate composition to pass through most sprayers without clogging the nozzles.
TIP : McDonald Stuart Landscaping offers a competitive and thorough maintenance service to local clients. Give our offices a call to set a time for one of our horticulturists to meet with you on site to give a quote.
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