02/12/2022
February Rose Maintenance - Posting 2nd Time to Try to Get to More People
February (zones 8A and south) into early March (zone 7b and north) is the time to begin late winter rose maintenance in the landscape. Whether you have Knock Out® Roses, Drift® Roses, some of the popular grandifloras, floribundas or hybrid teas, rose care is important in late winter to ensure good performance this spring and summer.
Determine soil pH. Roses prefer a soil pH of 6.5. Apply dolomitic lime if you need to raise pH or ammonium sulfate if you need to lower pH. Follow soil test recommendations.
Examine the sun situation. Roses need 8 hours of direct sun daily. Plant in raised landscape beds.
Consider mature size when spacing new plants. Knock Out® Roses need 4-5‘ between individual plants. Drift® Roses need 3-4’ between individual plants.
Pruning. 45 days before the peak spring bloom time in your area. Remove 1-2 thicker, larger canes when pruning older plants. Reduce plant height by 50-66%. Typically, across many areas in the South, early February to early March is the ideal time for rose pruning.
Refresh mulch. Add a new layer of pine straw or similar material. 2-3 inches is preferred.
Fertilizer. Use a three-month, controlled-release fertilizer at time of pruning. Consider adding Epsom salt (magnesium source) or gypsum (calcium source) if a soil test warrants it.
Apply contact fungicide. Application of a contact fungicide such as mancozeb will kill over-wintering fungal spores. Use a systemic fungicide 3-4 weeks after to lessen the potential for Cercospora leaf spot and blackspot development in late spring.