Jerusalem artichoke · Bolingbrook, Illinois, United States
When to plant jerusalem artichokes in Bolingbrook
Main outdoor window
22 Oct - 11 Apr
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
25 April
In Bolingbrook, on your chosen risk.
Ready to pick
1 Oct - 31 Dec
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 Bolingbrook
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.
Plant tubers
22 Oct - 11 Apr
Any time the plant is dormant and the ground is neither frozen nor waterlogged: after leaf fall in autumn, or at the end of winter before growth restarts.
Harvest
1 Oct - 31 Dec
Jerusalem artichokes through the year
Against the frost risk in Bolingbrook
Seasonal context
Rainfall and the growing season in Bolingbrook
May has the highest average precipitation (119 mm); January has the lowest (48 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 Bolingbrook
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 | -9.1°C (15.5°F)15.5°F (-9.1°C) | -0.6°C (31°F)31°F (-0.6°C) | 29.2 |
| February | -7.5°C (18.5°F)18.5°F (-7.5°C) | 2.3°C (36.1°F)36.1°F (2.3°C) | 26.3 |
| March | -2°C (28.5°F)28.5°F (-2°C) | 9.1°C (48.3°F)48.3°F (9.1°C) | 22.1 |
| April | 3.3°C (37.9°F)37.9°F (3.3°C) | 15.8°C (60.4°F)60.4°F (15.8°C) | 7.8 |
| May | 9.5°C (49.1°F)49.1°F (9.5°C) | 21.6°C (70.9°F)70.9°F (21.6°C) | 0.3 |
| June | 15.3°C (59.5°F)59.5°F (15.3°C) | 26.5°C (79.7°F)79.7°F (26.5°C) | 0.0 |
| July | 17.8°C (64°F)64°F (17.8°C) | 28.5°C (83.2°F)83.2°F (28.5°C) | 0.0 |
| August | 17.2°C (63°F)63°F (17.2°C) | 28.4°C (83.1°F)83.1°F (28.4°C) | 0.0 |
| September | 12.9°C (55.2°F)55.2°F (12.9°C) | 25.3°C (77.5°F)77.5°F (25.3°C) | 0.0 |
| October | 6.1°C (43°F)43°F (6.1°C) | 17.9°C (64.2°F)64.2°F (17.9°C) | 3.0 |
| November | -0.5°C (31°F)31°F (-0.5°C) | 9.4°C (48.9°F)48.9°F (9.4°C) | 17.6 |
| December | -5.9°C (21.4°F)21.4°F (-5.9°C) | 2.3°C (36.1°F)36.1°F (2.3°C) | 27.3 |
For jerusalem artichokes, 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 jerusalem artichokes for Bolingbrook
- May is the wettest month in the rainfall grid, averaging about 119 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 jerusalem artichokes
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.
- Check mature size, drainage and cultivar suitability before choosing a permanent position. A suitable planting window does not guarantee long-term survival or fruiting.
Contain the tubers and account for the tall canopy
Allow for tall stems and their shade before placing neighbouring vegetables. Support an exposed planting if wind threatens to rock it.
Lift tubers carefully when ready and keep track of the area harvested. If clearing the bed, returning shoots are a reminder to remove missed tubers rather than assume the crop has disappeared.
What to record this season
Where did missed tubers produce returning shoots after harvest? Add the cultivar, sowing date and conditions to your growing record so you can compare next season.
Further reading: RHS jerusalem artichokes growing guide . General crop guidance; local dates on this site are calculated separately. Source checked 19 September 2026 by Safe to Plant; this is not an expert review.
The RHS guide is written for UK growing conditions. Use its cultivation advice with local cultivar and seasonal guidance; its calendar months are not worldwide recommendations.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy
Why these dates
Allow for tall stems and their shade before placing neighbouring vegetables. Support an exposed planting if wind threatens to rock it.
Cold tolerance varies with cultivar, plant age, acclimatisation and the duration of a freeze. A plant surviving frost does not mean its leaves, heads, flowers or developing crop will remain undamaged. Check the forecast and the variety's local advice.
Jerusalem artichokes are planted once and then left in place, so there is no sowing offset to resolve. What matters in Bolingbrook is the shape of the year: this crop is dormant through the winter and is planted while it sleeps, any time between leaf fall in autumn and the restart of growth in spring, so long as the ground is neither frozen nor waterlogged. That is why the window below spans the cold months rather than sitting in the middle of the growing season.
Bolingbrook is zone 5b, 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 crops reliably.
Nearby
Jerusalem artichokes in places close by
Also in Bolingbrook
Other vegetables to time
Growing jerusalem artichokes in Bolingbrook
Can I grow jerusalem artichokes in Bolingbrook?
The calendar estimates a planting window, not a guarantee of success. May is the wettest month in the rainfall grid, averaging about 119 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 jerusalem artichokes in Bolingbrook?
Aim for 22 Oct - 11 Apr in an average year. If you would rather not gamble on the weather, wait until 8 Oct - 21 Apr - by then frost has finished in nine years out of ten.
When might jerusalem artichokes be ready to harvest in Bolingbrook?
The estimated period is 1 Oct - 31 Dec, based on 120 to 150 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 jerusalem artichokes tolerate?
Cold tolerance varies with cultivar, plant age, acclimatisation and the duration of a freeze. A plant surviving frost does not mean its leaves, heads, flowers or developing crop will remain undamaged. Check the forecast and the variety's local advice.