Weather for growing
5–23 °C
Indicative average air temperatures, rather than soil temperatures.
← What to plant today
EVERY PLANT HAS ITS MOMENT
When to plant Butterhead lettuce?
The right month changes from one garden to another. Let’s find the season for your little green corner, starting with the climate and how you want to begin.
Lactuca sativa Capitata Group
To help seeds sprout
15.6–23.9 °C
The warmth of the soil matters: check your seed packet too.
Time to harvest
55–85 days
Counted from sowing.
Sunlight
Sun or partial shade
Sun for part of the day is fine too.
Water
Regular
Keep the soil moist, without soaking it.
Growing advice
Leave room for the head to form and water without constantly wetting its centre.
Days to a full head are estimates: variety, heat and season can change timing and encourage bolting.
LET’S START HERE
Tell us about your little green corner.
THE CLIMATE COMES FIRST
See how temperatures change
The next two weeks
Forecast lows and highs · °C
The climate through the year
Historical data loads after the forecast.
A SEASON TO BEGIN
A calendar for your garden.
Choose your location above to see the usually more favourable periods, with sowing and transplanting shown separately.
How to read the calendar
This is an estimate from historical climate, rather than a forecast for this year or a calendar for your variety. We compare three starting dates per month (5, 15 and 25) with cold and time to grow. A favourable month doesn’t guarantee that every day will be suitable. To decide about today, check the weather forecast too.
Air temperature records don’t measure the soil: check its warmth before sowing or planting. Indoor sowing assumes around 22 °C and plenty of light; we consider the climate at the later transplanting time. For perennials, garlic and artichokes we only assess establishment. Variety, chilling requirements, day length and local conditions need separate checks.
YOUR GARDEN, TODAY
And what about today?
Choose your location to check whether today is a good time.
Seeds, bulbs and tubers
If you already have a young plant
ADVICE WITH ROOTS
Nature doesn’t follow
the same calendar everywhere.
Your location helps us work out when to start.
Three things matter more than the month on the calendar.
The right place
Location and local climate: a mountain garden has a different rhythm from a seaside balcony.
The right moment
The coming days’ temperatures help us consider sprouting, cold and heat.
Time to grow
Recent climate records help us consider the time until harvest, or while a plant settles in.
OPEN ABOUT OUR DATA
Where the suggestions come from.
Weather forecasts, climate records and a pilot catalogue with sources you can read. When information is missing, we say so.
Open-Meteo Forecasts and location search · CC BY 4.0 data ↗Copernicus ERA5-Land, via Open-Meteo Recent global climate records · roughly 11 km resolution ↗UC Cooperative Extension Vegetable seed germination temperatures ↗Universities and the RHS Growing references in each plant guide ↗
Each guide distinguishes documented information, estimates and missing values. Variety and local conditions can change timing and growing needs. The cold thresholds used for suggestions are not certified survival limits.