To keep them looking amazing in the coming months follow this simple guide:
- Roses are gross or heavy feeders (a little like children), meaning they require regular nutritious food to thrive and flower brilliantly. Apply granular fertiliser monthly such as PowerFeed with Troforte Flowers, Fruit & Citrus from July (immediately after pruning) to May.
- Apply a soluble fertiliser for flowering plants over the foliage fortnightly through the months of August – October and February to April. Liquid fertilisers are formulated so plants can take up nutrients fast producing quick ‘pick me. up’ results on stressed or hungry plants. In areas where pollution from nutrient leaching is a problem liquid formulations are the ideal choice. Try mixing Seasol (30mL per 9 litres of water) and PowerFeed (50mL per 9 litres of water) together in the same watering can every 2 to 4 weeks.
- Roses require at least 6 hours of bright, direct sun per day to flower prolifically. If they don’t receive this much direct light they tend to be stretched, have weak branches and are prone to pests and diseases.
- Do not use even slightly salty water for irrigating roses. They are very prone to salt scald and will die rapidly with poor water quality. If roses are being irrigated by dam, river or bore water, regular water quality checks are essential. Generally water quality is at its worst at the end of summer so it’s a good idea to get a check now to understand what may be causing scalding or burning problems.
- Apply a thick layer of composting mulch. The majority of the root system is in the top 10cm of the surface. A composting mulch will protect fine feeder roots from extra warm autumn days, reduce evaporation rate and deliver nutrients as it breaks down.