Consulting Rosarian Tip of the Month
Ease back on watering mid-late in the month to begin slowing down the rose growth in preparation for the dormant season. Apply final fertilizers by the middle of the month. If vigorous basal growth appears in the last part of August, it is wise to remove these new shoots which may not harden off before an early damaging frost. Powdery mildew may begin to reappear in the last half of the month. If it appears in spite of preventative sprays, consider using organic fungicides such as GreenCure® or Serenade for control.
- Water deeply before applying fertilizer. Fertilize with a water soluble fertilizer or Mile-Hi Rose Feed every six weeks.
- A 2 – 3 inch layer of mulch will conserve water and keep the soil cooler. Keep mulch an inch or two from the base of the cane.
- Cut spent blooms (aka dead heading) properly to promote continued flowering.
- Use Integrated Pest Management (IPM) to monitor for pests and diseases.
- Growing Roses in Colorado (GRIC) has a wealth of information on care of roses, find the book at area garden centers, gift stores or order from this website.
Consulting Rosarians (CRs) are available to assist you with your questions throughout the year. Contact them by typing in your question on our Contact Page. A list of CRs is on the DRS website – Denver Rose Society.
Please consider joining our society, we’d love to meet you. You may join on line or send in a paper copy. Paper Renewal for existing members or new members who prefer to mail in the form – Mail In Renewal OR New Membership Form. Memberships run one year from the joining date.
To meet other friendly rose devotees, please join us for our next monthly public meeting on September 14, 2017. Visitors and guests are always welcome!