How to water
Deep, occasional watering beats frequent light sprinkles. A deep soak sends water down to the lower roots and encourages them to grow deeper, which helps the plant through dry spells. A light sprinkle wets only the surface and keeps roots shallow.
- Water at the base. Keep water off the leaves where you can. Wet leaves, especially overnight, help black spot and other fungal diseases spread.
- Water in the morning. Leaves that do get wet then have all day to dry.
- Go slowly. A soaker hose, drip line or a slow trickle from a hose lets water sink in instead of running off.
- Check before you water. Push a finger or trowel into the soil. If the top few inches are dry, it is time.
How much and how often
A common guideline for established roses in the ground is about an inch of water a week, from rain and watering combined. Treat it as a starting point. Sandy soil, hot weather, wind and new plantings all need more. Heavy clay soil holds water longer and needs less. Roses in containers can need water every day in summer heat.
| Situation | What usually changes |
|---|---|
| Newly planted rose | Water more often through the first season while roots establish. |
| Hot, dry or windy weather | Check soil more often; deep soaks may be needed twice a week. |
| Sandy soil | Drains fast; water more often and add organic matter over time. |
| Clay soil | Holds water; water less often and watch for soggy ground. |
| Containers | Dry out quickly; check daily in summer. |
| Cool or rainy spells | Often no extra water needed. |
Mulch
A layer of organic mulch two to three inches deep, such as shredded bark, leaf mold or compost, keeps soil moist and cool, slows weeds and adds organic matter as it breaks down. Keep it a few inches back from the canes. Refresh it in spring after the main prune and clear away any old, disease-spotted leaves first.
Start with a soil test
Before buying any fertilizer, a soil test tells you the pH and which nutrients are already plentiful or low. Many cooperative extension services offer tests for home gardeners and explain the results. Adding nutrients your soil already has wastes money and can harm plants and nearby waterways.
Feeding in general terms
Roses are often described as heavy feeders, especially repeat bloomers that flower all summer. A typical pattern looks like this:
- In spring, as new leaves open after pruning, spread compost around the base and give a first feed if your soil test suggests one.
- Through the growing season, feed lightly every few weeks or as the product directs. Slow-release products need fewer applications.
- Water before and after feeding so fertilizer does not sit against dry roots.
- Stop feeding about six to eight weeks before your average first fall frost so the plant can harden off for winter.
Organic options such as compost and well-rotted manure feed the soil slowly. Packaged fertilizers vary widely. Whatever you use, follow the label rate. More is not better, and too much can burn roots and leaves.
Reading the plant
- Pale or yellowing older leaves may point to a nutrient shortage, but also to overwatering or poor drainage.
- Yellow leaves with green veins on new growth can be a sign of soil pH that is too high for the plant to take up iron.
- Lots of soft, leafy growth and few flowers can mean too much nitrogen.
- Wilting in the morning usually means the plant is short of water. Wilting in wet soil can mean root trouble.
Leaf symptoms have many causes, and pests and diseases can look like nutrient problems. If you are unsure, take a sample to your local extension office or Master Gardener help desk before treating anything.