A bare-root rose goes into Iowa soil while it is still asleep, with its canes bare and the ground just thawed. Container roses follow once spring settles in.
When to Plant Roses in Iowa
Bare-root roses go in first, in March and April, before growth starts, and container roses can follow from April through midsummer. In Des Moines, the last spring frost usually falls between April 12 and April 24, and a young rose with new leaves does not tolerate a freeze, so plant with a watchful eye on the forecast. Counties often run later than that Des Moines range, so treat it as the optimistic end. In Des Moines, the first fall frost arrives between October 14 and October 25, which marks when growth winds down. Iowa sits in USDA zones 4b to 6a, so the north is colder than the south. Here is how a rose’s year unfolds.
- Bare-root roses are planted dormant in March and April, as soon as they arrive from the nursery, and those months are also the time to prune repeat-blooming roses.
- From April through July, feeding follows the pruning, then comes again at first bloom and in mid-July.
- From April through midsummer, container roses can go into the ground, and bare-root planting can stretch into May, June or July if you must.
- After July, stop feeding so that soft new growth does not get caught by the first freezes.
- In November, once several killing freezes have put the plants to sleep, winter protection goes on, and it can wait until December if needed.
Plant bare-root roses early, while they are dormant and before growth starts.
Iowa — the year and the numbers
- State
- Iowa
- USDA zones
- 4b-6a
- Last spring frost
- April 12 to April 24
- First fall frost
- October 14 to October 25
- Annual rain
- 37 in
- Lawn zone
- cool-season
- Source
- NOAA NCEI 1991-2020 Climate Normals, 32F freeze probabilities · Des Moines
Which Roses Grow Best in Iowa?
Winter decides everything here. Hardy shrub, landscape, species and old garden roses come through with little fuss, while hybrid teas, grandifloras and floribundas are not reliably winter hardy and need protection.
Hardy shrub roses such as Knock Out or the Explorer series do well without extra cover, which makes them a sensible start for a first rose bed.
| Rose type | How it does in Iowa | Why |
|---|---|---|
| Most shrub and landscape roses | Reliably winter hardy | Need little winter preparation |
| Old garden roses | Reliably winter hardy | Many tolerate cold extremely well |
| Most species roses | Reliably winter hardy | No extensive winter preparation |
| Hybrid teas | Need protection | Not reliably winter hardy |
| Floribundas and grandifloras | Need protection | Not reliably winter hardy |
| Climbing roses | Most are not reliably hardy | Canes suffer in hard winters |
Some miniature and polyantha roses are hardy and some are not, so check the plant tag. Old garden roses, ramblers and many climbers bloom once a year on last year’s wood, so prune them right after they flower, never in early spring.
When to Prune, Feed and Protect Roses in Iowa
Prune repeat-blooming roses in March or April, when buds begin to swell. Feeding comes right after pruning, and winter cover goes on late in the year. The page on when to prune roses in Iowa goes deeper on the cuts themselves.
| Task | When to do it in Iowa | Why then |
|---|---|---|
| Pruning repeat-blooming roses | March, April (February can also work) | Winter cover is off and the forsythia is blooming |
| Feeding | April, May, June, July | After pruning, at first bloom, and in mid-July |
| Putting on winter protection | November (December can also work) | Several killing freezes have passed |
| Taking winter protection off | March, April | The ground has thawed |
Do not fertilize after July 31, since late feeding pushes soft growth that winter can easily damage. Pull the cover off gradually once the ground thaws, and prune soon after.
How Rose Care Dates Change Across Iowa
Across Iowa, the season shifts a little from the cold north to the warmer south, so use the months above as a guide and watch your own plants.
- Northern Iowa: Northern Iowa often thaws later, so lean toward the later part of each window for planting and uncovering roses.
- Southern Iowa: Southern Iowa often warms earlier, so the early part of the March and April windows can suit bare-root planting and uncovering.
- Central Iowa, around Des Moines: Use the statewide windows, and put winter protection on after several killing freezes.
The forsythia is a handy local signal. When it blooms in your yard, the time for pruning repeat bloomers has arrived.
Where to Get Rose Advice in Iowa
Iowa State University Extension publishes rose guidance written for Iowa conditions, and your county extension office can help with a sick plant or a soil test.
- Extension articles cover planting, pruning and overwintering, and they are worth reading before bare-root roses arrive in spring.
- County offices can look at a troubled leaf or cane and suggest a soil test before you plant.
Common Questions
Can You Plant a Rose in July?
Yes, a container rose can go in through midsummer. Bare-root roses can also be planted in July if needed, though they are better planted dormant in March and April.
Do Roses Need Winter Protection in Iowa?
Hybrid teas, floribundas and grandifloras do. Hardy shrub roses such as Knock Out or the Explorer series perform well without extra cover.
When Should You Stop Feeding Roses?
Stop after July 31. Feeding later pushes tender growth that freezes can injure.