Coneflower · Gary, Indiana, United States
When to plant coneflowers in Gary
Main outdoor window
6 May - 3 Jun
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
22 April
In Gary, on your chosen risk.
First flowers
1 Jul - 30 Sep
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Gary
Download these planting dates (.ics)
Import into Apple Calendar, Google Calendar or Outlook. Dates use the selected risk level and are planning estimates, not frost alerts.
Each window is a planning range. Check the forecast, soil and cultivar before planting; a later date is not automatically safer in hot or wet conditions.
Start indoors
1-29 Jul
Ten weeks before your last frost, under cover or on a windowsill.
Plant out
6 May - 3 Jun
Two weeks after your last frost.
In flower
1 Jul - 30 Sep
Coneflowers through the year
Against the frost risk in Gary
Seasonal context
Rainfall and the growing season in Gary
May has the highest average precipitation (114 mm); January has the lowest (51 mm). Compare this pattern with the planting windows and your water supply.
During wetter months, check that beds and containers drain after heavy rain. During drier months, plan how you will keep seeds and new transplants watered. Monthly averages can hide long dry spells and intense storms; they do not show soil moisture, humidity or this week's weather.
Source: NASA POWER, corrected MERRA-2 precipitation, 2001–2020. Values are approximate monthly totals, including the water equivalent of snow, from the nearest 0.5° × 0.625° grid cell. This reference period differs from the temperature record. Rainfall provides context and does not change the calculated planting dates. Method and limitations.
Monthly growing conditions in Gary
Compare the planting window with the local temperature pattern. These are historical monthly averages, not this year's forecast or measured soil temperatures. Average frost days do not tell you whether a particular night will freeze.
| Month | Average low | Average high | Frost days |
|---|---|---|---|
| January | -7.8°C (17.9°F)17.9°F (-7.8°C) | -0.4°C (31.3°F)31.3°F (-0.4°C) | 28.4 |
| February | -6.5°C (20.3°F)20.3°F (-6.5°C) | 2.1°C (35.7°F)35.7°F (2.1°C) | 25.9 |
| March | -1.6°C (29.1°F)29.1°F (-1.6°C) | 8.2°C (46.7°F)46.7°F (8.2°C) | 21.5 |
| April | 3.4°C (38.2°F)38.2°F (3.4°C) | 14.6°C (58.3°F)58.3°F (14.6°C) | 6.7 |
| May | 9.4°C (48.9°F)48.9°F (9.4°C) | 20.4°C (68.8°F)68.8°F (20.4°C) | 0.2 |
| June | 15.2°C (59.4°F)59.4°F (15.2°C) | 25.7°C (78.2°F)78.2°F (25.7°C) | 0.0 |
| July | 18.1°C (64.6°F)64.6°F (18.1°C) | 28.1°C (82.6°F)82.6°F (28.1°C) | 0.0 |
| August | 17.8°C (64°F)64°F (17.8°C) | 28°C (82.3°F)82.3°F (28°C) | 0.0 |
| September | 13.7°C (56.6°F)56.6°F (13.7°C) | 24.7°C (76.5°F)76.5°F (24.7°C) | 0.0 |
| October | 7°C (44.6°F)44.6°F (7°C) | 17.5°C (63.4°F)63.4°F (17.5°C) | 1.4 |
| November | 0.5°C (32.8°F)32.8°F (0.5°C) | 9.2°C (48.6°F)48.6°F (9.2°C) | 14.8 |
| December | -4.7°C (23.6°F)23.6°F (-4.7°C) | 2.5°C (36.5°F)36.5°F (2.5°C) | 25.9 |
For coneflowers, also check drainage, sunlight and cultivar requirements. See the rainfall context above; humidity, irrigation and local pest pressure are not calculated.
Local growing check
Before choosing coneflowers for Gary
- May is the wettest month in the rainfall grid, averaging about 114 mm. Check how your own bed drains and plan watering around actual soil moisture; monthly rain totals are not an irrigation schedule.
The temperature and rainfall tables on this page show the underlying climate estimates. How these suitability checks work · Record what happens in your garden.
Before you plant coneflowers
Use the calendar to plan ahead, then check the conditions in your own garden.
- Frost tolerance does not make saturated or frozen soil suitable for planting. Wait until the bed can be worked without smearing or compacting it.
- Harden off plants raised indoors: gradually expose them to outdoor light, wind and temperature before their final move into the bed.
- Check mature size, drainage and cultivar suitability before choosing a permanent position. A suitable planting window does not guarantee long-term survival or fruiting.
Establish coneflowers before relying on drought tolerance
Choose a sunny or lightly shaded position with good drainage. Established plants tolerate drought, but newly planted roots still need attention while they settle in.
Cultivars differ in size and flower form. Match mature height to the border and choose flowers accessible to pollinators if wildlife value is your priority.
Leaving some seed heads can provide food for birds. NC State also recommends retaining portions of hollow dead stems for nesting insects, rather than clearing all growth to ground level.
Further reading: NC State Extension Plant Toolbox: purple coneflower . General crop guidance; local dates on this site are calculated separately. Source checked 18 September 2026 by Safe to Plant; this is not an expert review.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy
Why these dates
Choose a sunny or lightly shaded position with good drainage. Established plants tolerate drought, but newly planted roots still need attention while they settle in.
Check the named variety and local forecast before exposing young growth. The catalog cold-damage figure is a reference, not a guarantee: plant age, acclimatisation, wind and the duration of a freeze affect damage.
This calendar uses frost-relative offsets as a starting point. Coneflowers are timed from 10 weeks before that frost for an indoor start, with planting out 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Gary.
Gary is zone 6a, within the crop's general range. This is an initial cold-hardiness check; cultivar, exposure, drainage and unusual winters can still change the outcome.
The general establishment guide is around year 1, under suitable conditions. This is not a prediction for this location; cultivar, winter conditions and care determine whether it flowers reliably.
Also in Gary
Other flowers to time
Growing coneflowers in Gary
Can I grow coneflowers in Gary?
The calendar estimates a planting window, not a guarantee of success. May is the wettest month in the rainfall grid, averaging about 114 mm. Check how your own bed drains and plan watering around actual soil moisture; monthly rain totals are not an irrigation schedule.
When should I plant coneflowers in Gary?
Aim for 6 May - 3 Jun in an average year. If you would rather not gamble on the weather, wait until 19 May - 16 Jun - by then frost has finished in nine years out of ten.
When might coneflowers flower in Gary?
The estimated period is 1 Jul - 30 Sep, based on 110 to 140 days from the modeled planting date. Cultivar, planting material and growing conditions can change this interval; check the plant as well as the calendar.
How much frost will coneflowers tolerate?
Check the named variety and local forecast before exposing young growth. The catalog cold-damage figure is a reference, not a guarantee: plant age, acclimatisation, wind and the duration of a freeze affect damage.