Mibuna · Brockton, Massachusetts, United States
When to plant mibuna in Brockton
Main outdoor window
23 Mar - 20 Apr
A climate estimate. Check your soil, forecast and cultivar.
Timed from last spring frost
18 April
In Brockton, on your chosen risk.
Ready to pick
1 May - 30 Nov
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 Brockton
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.
Sow for overwintering
10-31 Aug
Counting back 64 days from your first frost so the crop matures in time.
Sow direct
23 Mar - 20 Apr
Delayed by a soil-warming estimate derived from historical air temperatures. The frost-only date would be 21 Mar. Measure your soil before planting.
Harvest
1 May - 30 Nov
Mibuna through the year
Against the frost risk in Brockton
Seasonal context
Rainfall and the growing season in Brockton
October has the highest average precipitation (123 mm); February has the lowest (85 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 Brockton
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 | -6.4°C (20.4°F)20.4°F (-6.4°C) | 1.7°C (35°F)35°F (1.7°C) | 27.2 |
| February | -5.8°C (21.7°F)21.7°F (-5.8°C) | 2.9°C (37.2°F)37.2°F (2.9°C) | 25.3 |
| March | -2.3°C (27.9°F)27.9°F (-2.3°C) | 7°C (44.6°F)44.6°F (7°C) | 22.4 |
| April | 2.7°C (36.8°F)36.8°F (2.7°C) | 13.2°C (55.8°F)55.8°F (13.2°C) | 6.8 |
| May | 8.4°C (47.1°F)47.1°F (8.4°C) | 19.2°C (66.5°F)66.5°F (19.2°C) | 0.0 |
| June | 13.8°C (56.9°F)56.9°F (13.8°C) | 24.2°C (75.6°F)75.6°F (24.2°C) | 0.0 |
| July | 17.7°C (63.8°F)63.8°F (17.7°C) | 28.1°C (82.6°F)82.6°F (28.1°C) | 0.0 |
| August | 17.2°C (62.9°F)62.9°F (17.2°C) | 28°C (82.4°F)82.4°F (28°C) | 0.0 |
| September | 13.4°C (56.1°F)56.1°F (13.4°C) | 24.2°C (75.6°F)75.6°F (24.2°C) | 0.0 |
| October | 7.5°C (45.5°F)45.5°F (7.5°C) | 17.3°C (63.2°F)63.2°F (17.3°C) | 1.0 |
| November | 1.7°C (35°F)35°F (1.7°C) | 10.5°C (50.9°F)50.9°F (10.5°C) | 11.1 |
| December | -2.9°C (26.8°F)26.8°F (-2.9°C) | 4.7°C (40.5°F)40.5°F (4.7°C) | 24.0 |
For mibuna, 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 mibuna for Brockton
- October is the wettest month in the rainfall grid, averaging about 123 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 mibuna
Use the calendar to plan ahead, then check the conditions in your own garden.
- Measure the soil at sowing depth. Aim for at least 4.5°C (40.1°F); the calendar estimates soil warmth from air temperatures and cannot measure your bed.
- Frost tolerance does not make saturated or frozen soil suitable for planting. Wait until the bed can be worked without smearing or compacting it.
- Use the maturity range on your seed packet when choosing a variety. Cold, short days and transplant stress can make harvest later than the calendar estimate.
Choose mibuna's narrow leaves for repeated young harvests
Use a fertile, drained bed and keep moisture steady. Decide between closely spaced baby leaves and larger clumps for repeated picking; the same spacing is not ideal for both.
Take tender leaves without destroying the growing centre where regrowth is intended. Inspect the next flush for quality and pest damage, and replace ageing plants with a small new sowing when necessary. Record the named variety because mibuna and mizuna are sometimes grouped together in catalogs.
What to record this season
Did the narrower leaves suit your kitchen use, and how many tender cuts were practical? Add the cultivar, sowing date and conditions to your growing record so you can compare next season.
Further reading: Brassica rapa nipposinica Mizuna PFAF Plant Database . 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.
Plants For A Future compiles botanical and cultivation references. This is general species guidance, not a local field trial or evidence that every cultivar will crop in your climate. This reference covers the broader plant group; confirm the named form and its specific requirements with the supplier.
How the dates are calculated and their limits · Keep a growing record · Report a local discrepancy
Why these dates
Use a fertile, drained bed and keep moisture steady. Decide between closely spaced baby leaves and larger clumps for repeated picking; the same spacing is not ideal for both.
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. Mibuna are timed for direct sowing 4 weeks before it, and this page simply resolves those offsets against the frost date computed for Brockton.
The calendar also applies a soil-warming estimate derived from historical air temperatures. Where that estimate is later than the frost-based date, it delays the window. Soil in your own garden can warm earlier or later; a thermometer at sowing depth is a better final check. Cold, wet conditions can slow germination and increase decay risk.
The median frost-free season here is 200 days, against 40 to 50 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Brockton
Other vegetables to time
Growing mibuna in Brockton
Can I grow mibuna in Brockton?
The calendar estimates a planting window, not a guarantee of success. October is the wettest month in the rainfall grid, averaging about 123 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 mibuna in Brockton?
Aim for 23 Mar - 20 Apr in an average year. If you would rather not gamble on the weather, wait until 30 Mar - 27 Apr - by then frost has finished in nine years out of ten.
Can I plant mibuna earlier in Brockton?
The historical frost estimate is 21 Mar. For Mibuna, an air-temperature model estimates soil warmth of about 4.5°C (40.1°F) around 23 Mar. This is not a soil measurement or a forecast. Check your bed at sowing depth; cold, wet conditions can slow growth and increase decay risk.
When might mibuna be ready to harvest in Brockton?
The estimated period is 1 May - 30 Nov, based on 40 to 50 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 mibuna 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.