With the Rose Parade and the Rose Bowl starting the year off, I thought there was no better time than now to ask this simple question!
When Is The Best Time To Plant Roses?
And the answer is … it all depends on where you live and the climate zone your in. The simplest solution is to ask your local nursery for frost dates and their recommendation for the best time to plant in your local area.
Since I live and work in Los Angeles and there is very little chance of frost, December or January is an excellent time to plant. It gives the newly planted roses the time to grow feeder roots before spring arrives and they come out of dormancy.
However, because Southern California has many microclimates, ranging from moderate and moist to severely dry and hot, roses in hotter, drier areas need more care and attention.
The following list of instructions should give anyone interested in growing roses a simple roadmap of how to proceed. It comes from the website eHow home, which has a lot of additional information should you be interested.
- Choose roses based on the 24-zone climate system established by “Sunset Magazine.” The University of California Cooperative Extension encourages the use of this system because, unlike the USDA zone system, it also factors in summer high temperatures.
- Plant new roses in January. Prune established roses to half their height. Thin out roses and remove excess foliage. Complete all pruning by the end of January.
- Remedy problems as soon as they start. Gardeners in Southern California begin to see aphids and mildew in mid-to-late February. Apply insect control and fungicides as needed.
- Apply a weekly fertilizer during peak growing season, typically from April to mid July.
- Feed your roses in March as they begin to develop new foliage. Supply a dose of 20-20-20 fertilizer for optimal results.
- Spray for spider mites in April. These bugs harm roses. Use a miticide or wash roses by hand.
- Deadhead blooms in May. Southern California roses have two blooming cycles. Mid-May marks the end of the first. Encourage new blooms by removing spent ones.
Keep your roses watered. This is of particular import during peak blooming season, which also coincides with the hottest months of the year. Water daily through the end of October. Remember to water frequently well into fall to account for the dryness caused by the Santa Ana winds.
- Complete a round of light pruning in October. Re-apply mildew and pest treatments as needed. Cooler weather allows bugs and fungi to reappear with ease.
Tips & Warnings
Mulch your roses after planting. Mulch slows the growth of weeds and helps lock in moisture.
- University of California Cooperative Extension: California Gardening: What Is My Climate Zone?
- The Ventura County Rose Society: Good to Grow
- Santa Clarita Valley Rose Society: Monthly Rose Care for Southern California
- Santa Clarita Rose Society: Growing Roses From Blood, Bloom and Beyond
- “Pat Welsh’s Southern California Garden”; Pat Welsh; 2000