Robert Spencer, commercial horticulture specialist at the Alberta Ag-Info Centre, has published a “to do” list for the month of July. The list includes the following items for greenhouse ornamentals:
- If holding plants for extended periods, ensure plants are kept healthy, fertilized and free from pests. Apply sufficient water, maintenance fertilizer, etc. when needed.
- Clear out older stock as quickly as possible.
- Monitor for spider mites and aphids, as well as foliar diseases such as powdery mildew.
- Correct situations that encourage fungus gnats.