Knockout roses are known for their hardiness, ease of care, and ability to bloom continuously from spring through fall. While they are low-maintenance compared to other rose varieties, they still benefit from regular fertilization to keep them producing vibrant blooms throughout the growing season.
Early Spring: The best time to start fertilizing Knockout roses is in early spring, right when you see new growth. This gives the plant a boost as it wakes up from winter dormancy and begins its growing and blooming cycle. Use Perfect Rose fertilizer to provide the right balance of nutrients that Knockout roses need. Mix 1 tablespoon per gallon of water and apply about half a gallon per plant every 7-14 days.
Throughout the Growing Season: Knockout roses bloom repeatedly, so they need regular feeding to keep producing flowers. Continue applying Perfect Rose fertilizer every 7-14 days throughout the growing season, especially after each flush of blooms. This will ensure that your Knockout roses continue to bloom abundantly all season long.
Mid-Summer: As the summer heat intensifies, Knockout roses may slow down their blooming. A mid-summer application of fertilizer helps encourage new blooms and supports overall plant health as the roses deal with the stresses of heat and drought. For container-grown Knockout roses, mix 1 tablespoon of Perfect Rose fertilizer per 1.25 gallons of water and apply according to the instructions.
Stop Fertilizing in Late Summer: In colder climates, stop fertilizing Knockout roses in late August or early September to allow them to prepare for winter dormancy. Encouraging new growth late in the season can leave the plant vulnerable to frost damage.
By following this fertilization schedule, you can enjoy vibrant Knockout roses that bloom continuously throughout the growing season with minimal maintenance.
Get Perfect Rose fertilizer.