Johann7

butterhead lettuce Butterhead Lettuce planting

grown by Johann7 in Seedling Trays · Shorewood, WI

All of Johann7's plantings

Done
  1. Sown 2026-03-23
  2. First harvest 2026-05-26 expected
  3. Last harvest 2026-06-18 expected
  4. Finished 2026-06-18 expected

No harvest months for this crop at this latitude yet.

Planted

8 months ago 2026-03-23

Progress

Done Finished

Degree days

2,822 of about 403 needed

Quantity

4 seeds

Grown in

full sun

Rating

3 of 5

Grown from

Seed

Weather in Shorewood, WI New

Daily high and low
Too hot and too cold for butterhead lettuce so farFrom Mar 23 to Jun 07, 28 of 77 days had a high inside the best range of 12–21°C. The low reached the killing temperature of 0°C on 11 days. The highs were below the best range on 21 days and above the best range on 28 days. The weather was too hot on 4 days (highs above 30°C) and too cold on 32 days (lows below 5°C).
2 °C frost lineDies at 0 °CGrows at 5–30°Grows best 12–21°
Daily rainfall
Rain
733 mm
Hottest day
38.6°C
Coldest night
-4.9°C
Soil temperature
18.1°C
Days in its best range
75 of 233
Days
233

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information. The weather is modelled for the area around the garden, not measured in it, and runs a few days behind. The totals, charts and expected weather are our adaptation of that data.

Notes

2x green butterhead, 2x red butterhead

Photos

No photos yet.

Observations

Nothing noticed yet. Note when it flowers, fruits, wilts or falls ill.

  1. Day 0
    Planted

Frost

Experimental · new and might be flaky

Frost may have reached this butterhead lettuce planting

22 nights while frost was possible were at or below 2 °C. The coldest was -4.9 °C.

This butterhead lettuce planting against the frost season

  • Usual frost danger
  • Possible: as early or late as it has come
  • Planting, finished
Coldest night
-4.9 °C
6.9 °C below the 2 °C frost danger line
Frost danger it grew through
52 days
from planting to the latest it has come, 13 May
Usual last frost
2 May
planted 40 days before it

Experimental: this feature is new and might be flaky. These dates are estimates from 25 km weather-model data, not readings from a station at your garden, so a cold spot can be colder. They may be wrong, so check your national weather service and ask local growers before relying on them.

Weather data by Open-Meteo.com (CC BY 4.0)

Harvests

No harvests recorded yet.

Seeds saved

No seeds saved yet.

Jobs

This was the last planting recently in this bed. Would you like to cultivate the soil soon? Cultivate soil

Nothing is planned here.

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Crop

Photo of butterhead lettuce

Butterhead Lettuce

Lactuca sativa var. capitata

a variety of Lettuce

  • 7 plantings
  • 8 harvests
  • An annual, living about 76 days
  • First harvest about 62 days after planting
  • Last harvest about 87 days after planting
More about butterhead lettuce