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Q: I've heard that Epsom salts are good for roses. How much of it should I use and how often? Do you have any other suggestions for care of roses?
Hardiness Zone: 10a
Thank you.
Mary from Redding, CA
A: Mary,
Rose growers sometimes use Epsom salt in order to add magnesium to the soil. Roses tend to be heavy feeders of magnesium, but if you already feed you roses a balanced fertilizer containing magnesium, you probably don't need to add any to your soil. A soil test is the only way to tell for sure. If you do need it, sprinkle a couple of teaspoons around each bush once a month before watering. Any more and you could risk hurting your plants. Follow these general tips for raising good roses:
1. When planting, older varieties tend to be hardier, so do potted vs. bare-root roses.
2. Roses should be planted in the late spring and early summer to give roots time to develop before winter.
3. Plant roses in rich, well-drained soil with a pH between 5.5 to 7.
4. Planting holes need to be at least 2 1/2 times the size of the root ball.
5. Give roses a good, deep soaking (4-5 gallons) once per week.
6. Feed roses lightly (but often) from spring until 6-8 weeks before your first frost.
7. Keep canes healthy by following a regular pruning and maintenance schedule according to the rose type (bush, tree, climbing).
The Shasta Rose Society in Redding, CA, has a good web site with tips for caring for roses in your climate. It also lists events, meetings, tours, and a Rosarian Expert that you can email with specific questions about roses in your area. http://www.shastarosesociety.org
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