Les quatre dates qui comptent
| Date | Quand | Ce que cela veut dire |
|---|---|---|
| Dernier gel de printemps (50 %) | Mar 17 | Une année sur deux gèle après cette date. C’est une moyenne, pas une garantie. |
| Dernier gel de printemps (10 %) | Apr 6 | Une année sur dix seulement gèle après. À retenir pour ce que vous ne pouvez pas vous permettre de resemer. |
| Premier gel d’automne (50 %) | Nov 11 | Une année sur deux gèle avant cette date. Les cultures d’automne se comptent à rebours depuis là. |
| Premier gel d’automne (10 %) | Oct 27 | Une année à gel précoce. Si une culture doit finir, visez une récolte avant cette date. |
Semis de printemps et d’été à Greensboro
Les dates sont calculées à partir du dernier gel propre à ce lieu, pas d’un tableau générique par zone. Les « meilleurs jours lunaires » sont les jours de chaque fenêtre qui tombent dans la phase traditionnelle de la culture — la règle même de l’application.
| Culture | Semis à l’abri | Plantation dehors | Meilleurs jours lunaires | Jours avant récolte |
|---|---|---|---|---|
| Strawberry (crowns) transplant |
— | Jan 16 – Feb 24 | Feb 1 Full Moon |
perennial — first real harvest next season |
| Garlic cloves/sets Mieux vaut semer en automne — voir plus bas |
— | Jan 29 – Mar 1 | Feb 2–7 Waning Gibbous |
240–300 |
| Asparagus (crowns) transplant |
— | Feb 3 – Mar 10 | Feb 24 First Quarter |
perennial — first real harvest 2–3 years |
| Chives either |
Jan 20 | Feb 3 – Mar 10 | Feb 18–23 Waxing Crescent |
75–90 |
| Onion (from sets/transplants) cloves/sets |
— | Feb 3 – Mar 10 | Feb 3–8 Waning Gibbous |
90–120 |
| Peas (English/snap) direct sow |
— | Feb 3 – Mar 10 | Feb 24 First Quarter |
55–75 |
| Spinach direct sow |
— | Feb 3 – Mar 10 | Feb 18–23 Waxing Crescent |
35–50 |
| Cabbage transplant |
Jan 13 | Feb 10 – Mar 10 | Feb 18–23 Waxing Crescent |
65–90 |
| Collards either |
Feb 3 | Feb 10 – Mar 31 | Feb 18–23 Waxing Crescent |
55–85 |
| Kale either |
Feb 3 | Feb 10 – Mar 17 | Feb 18–23 Waxing Crescent |
50–65 |
| Lettuce (leaf) either |
Feb 10 | Feb 10 – Apr 7 | Feb 18–23 Waxing Crescent |
40–55 |
| Potato cloves/sets |
— | Feb 10 – Mar 17 | Mar 3 Full Moon |
70–120 |
| Radish direct sow |
— | Feb 10 – Apr 7 | Mar 4–9 Waning Gibbous |
22–35 |
| Turnip direct sow |
— | Feb 10 – Mar 24 | Mar 4–9 Waning Gibbous |
40–60 |
| Broccoli transplant |
Jan 13 | Feb 15 – Mar 17 | Feb 18–23 Waxing Crescent |
55–80 |
| Brussels Sprouts transplant |
Jan 13 | Feb 15 – Mar 17 | Feb 18–23 Waxing Crescent |
90–110 |
| Leek transplant |
Jan 6 | Feb 15 – Mar 17 | Mar 4–9 Waning Gibbous |
100–120 |
| Lettuce (head) transplant |
Jan 27 | Feb 15 – Mar 17 | Feb 18–23 Waxing Crescent |
60–85 |
| Parsley either |
Jan 13 | Feb 15 – Mar 24 | Feb 18–23 Waxing Crescent |
70–90 |
| Parsnip direct sow |
— | Feb 15 – Mar 24 | Mar 3 Full Moon |
100–150 |
| Shallot cloves/sets Mieux vaut semer en automne — voir plus bas |
— | Feb 15 – Mar 17 | Mar 4–9 Waning Gibbous |
90–120 |
| Beet direct sow |
— | Feb 17 – Apr 7 | Mar 3, Apr 1 Full Moon |
50–65 |
| Kohlrabi either |
Feb 3 | Feb 17 – Mar 24 | Feb 18–23 Waxing Crescent |
45–60 |
| Carrot direct sow |
— | Feb 24 – Apr 7 | Mar 3, Apr 1 Full Moon |
65–85 |
| Cauliflower transplant |
Jan 13 | Feb 24 – Mar 17 | — Waxing Crescent |
55–80 |
| Cilantro direct sow |
— | Feb 24 – Apr 7 | Mar 19–24 Waxing Crescent |
45–70 |
| Swiss Chard direct sow |
— | Feb 24 – Apr 16 | Mar 19–24 Waxing Crescent |
50–60 |
| Dill direct sow |
— | Mar 3 – Apr 16 | Mar 19–24 Waxing Crescent |
40–60 |
| Cucumber either |
Feb 24 | Mar 17 – Apr 16 | Mar 25 First Quarter |
50–70 |
| Green Beans (bush) direct sow |
— | Mar 17 – May 1 | Mar 25, Apr 23 First Quarter |
50–65 |
| Oregano transplant |
Jan 20 | Mar 17 – Apr 7 | Mar 25 First Quarter |
cut as needed |
| Sage transplant |
Jan 20 | Mar 17 – Apr 7 | Mar 25 First Quarter |
cut as needed |
| Sweet Corn direct sow |
— | Mar 17 – May 1 | Mar 25, Apr 23 First Quarter |
60–100 |
| Thyme transplant |
Jan 20 | Mar 17 – Apr 7 | Mar 25 First Quarter |
cut as needed |
| Zucchini / Summer Squash either |
Feb 24 | Mar 17 – Apr 16 | Mar 25 First Quarter |
45–60 |
| Basil either |
Feb 3 | Mar 24 – Apr 16 | Mar 24 Waxing Crescent |
30–60 |
| Dry Beans direct sow |
— | Mar 24 – Apr 21 | Mar 25 First Quarter |
85–100 |
| Pole Beans direct sow |
— | Mar 24 – Apr 26 | Mar 25, Apr 23 First Quarter |
60–75 |
| Pumpkin direct sow |
Feb 24 | Mar 24 – Apr 21 | Mar 25 First Quarter |
90–120 |
| Rosemary transplant |
Mar 17 | Mar 24 – Apr 16 | Mar 25 First Quarter |
cut as needed |
| Tomatillo transplant |
Feb 3 | Mar 24 – Apr 16 | Mar 25 First Quarter |
60–75 |
| Tomato transplant |
Feb 3 | Mar 24 – Apr 16 | Mar 25 First Quarter |
60–85 |
| Winter Squash direct sow |
Feb 24 | Mar 24 – Apr 21 | Mar 25 First Quarter |
85–110 |
| Cantaloupe / Muskmelon either |
Feb 24 | Mar 31 – Apr 21 | — First Quarter |
75–90 |
| Eggplant transplant |
Jan 20 | Mar 31 – Apr 21 | — First Quarter |
60–90 |
| Okra direct sow |
Feb 17 | Mar 31 – Apr 26 | Apr 23 First Quarter |
50–70 |
| Pepper transplant |
Jan 20 | Mar 31 – Apr 21 | — First Quarter |
60–90 |
| Sweet Potato slips |
— | Mar 31 – Apr 26 | Apr 2–7 Waning Gibbous |
90–150 |
| Watermelon either |
Feb 24 | Mar 31 – Apr 21 | — First Quarter |
70–90 |
Semis d’automne à Greensboro
Les dates d’automne se comptent à rebours depuis le premier gel, et elles rajoutent du temps pour le « facteur d’automne » : les jours raccourcissent et refroidissent, donc une culture pousse plus lentement que ne le promet le sachet. Semer trop tard est de loin la première cause d’échec d’un potager d’automne.
| Culture | Semer ou mettre en place | Meilleurs jours lunaires | Jours avant récolte | Rusticité |
|---|---|---|---|---|
| Tomato | Jun 26 – Aug 1 | Jul 21 | 60–85 | very tender |
| Brussels Sprouts | Jun 29 – Jul 16 | Jul 15–16 | 90–110 | hardy |
| Potato | Jul 4 – Aug 5 | Jul 29 | 70–120 | semi-hardy |
| Sweet Corn | Jul 9 – Aug 1 | Jul 21 | 60–100 | tender |
| Pole Beans | Jul 19 – Aug 1 | Jul 21 | 60–75 | tender |
| Parsley | Jul 22 – Aug 5 | — | 70–90 | semi-hardy |
| Okra | Jul 24 – Aug 23 | Aug 19 | 50–70 | very tender |
| Cabbage | Jul 29 – Aug 10 | — | 65–90 | hardy |
| Carrot | Jul 29 – Aug 10 | Jul 29 | 65–85 | semi-hardy |
| Collards | Jul 29 – Aug 20 | Aug 13–18 | 55–85 | hardy |
| Cucumber | Jul 29 – Aug 11 | — | 50–70 | tender |
| Broccoli | Aug 3 – Aug 20 | Aug 13–18 | 55–80 | hardy |
| Cauliflower | Aug 3 – Aug 20 | Aug 13–18 | 55–80 | semi-hardy |
| Green Beans (bush) | Aug 3 – Aug 11 | — | 50–65 | tender |
| Lettuce (head) | Aug 3 – Aug 15 | Aug 13–15 | 60–85 | semi-hardy |
| Peas (English/snap) | Aug 3 – Aug 20 | Aug 19 | 55–75 | hardy |
| Beet | Aug 8 – Aug 25 | — | 50–65 | semi-hardy |
| Kale | Aug 8 – Aug 25 | Aug 13–18 | 50–65 | hardy |
| Swiss Chard | Aug 8 – Aug 25 | Aug 13–18 | 50–60 | semi-hardy |
| Zucchini / Summer Squash | Aug 8 – Aug 16 | — | 45–60 | tender |
| Basil | Aug 13 – Aug 31 | Aug 13–18 | 30–60 | very tender |
| Kohlrabi | Aug 13 – Aug 30 | Aug 13–18 | 45–60 | hardy |
| Cilantro | Aug 18 – Aug 30 | Aug 18 | 45–70 | semi-hardy |
| Lettuce (leaf) | Aug 18 – Sep 4 | Aug 18 | 40–55 | semi-hardy |
| Turnip | Aug 18 – Sep 4 | Aug 28–Sep 2 | 40–60 | hardy |
| Spinach | Aug 23 – Sep 9 | — | 35–50 | hardy |
| Dill | Aug 28 – Sep 4 | — | 40–60 | semi-hardy |
| Radish | Aug 28 – Sep 22 | Aug 28–Sep 2 | 22–35 | hardy |
| Garlic | Oct 12 – Dec 2 | Oct 26–31 | 240–300 | hardy |
| Shallot | Oct 26 – Nov 26 | Oct 26–31 | 90–120 | hardy |
D’où viennent ces chiffres
Les dates de gel de cette page sont des normales observées en station, pas des estimations : elles viennent de Greensboro 2 Wnw (GHCN USW00063893), l’une des 6 808 stations américaines des Climate Normals 1991–2020 de la NOAA. La zone de rusticité vient de l’USDA Plant Hardiness Zone Map 2023. Le calendrier des cultures est exprimé en décalages par rapport à vos gelées, d’après les guides de semis des Extensions universitaires.
Quelle est la précision de tout cela ?
Extension recommendations for the same crop routinely disagree by two to four weeks, and occasionally more, so these offsets should be presented as windows and starting points rather than deadlines. Three things drive the spread. (1) Regional risk tolerance: for warm-season crops, Colorado State and Utah State put tomatoes, peppers and melons out about 14 days after the last frost, while University of Missouri's calendar works out to roughly 25-35 days after the last frost and University of Maryland's window runs from the frost date itself out to 45 days past it. That is a real 6-week spread for the single most popular garden crop, and it exists because a short-season mountain state is optimizing against a short season while a humid continental state is optimizing against cold, wet spring soil. (2) Soil temperature versus calendar date: most Extension services now say the honest trigger is soil temperature at 4 inches, not the frost date, and the frost-relative number is a convenience translation. A cold, wet spring can push the real date two or three weeks past the calendar recommendation. (3) Days-to-maturity is variety-specific and is measured differently for direct-seeded versus transplanted crops - seed catalogs count from transplant date for tomatoes, peppers, eggplant and cole crops, but from sowing for roots and greens - so a 'days to maturity' range of 60-85 for tomato is genuinely 60-85 depending on which packet you bought. Additionally, the average last frost is a 50% probability, meaning half of all years have a frost after that date; Extension services commonly advise waiting 1-2 weeks past it for anything frost-tender, or being prepared to cover. Treat every number here as plus or minus about 10-14 days.
Sur la station elle-même : une station météo, c’est un point. Les villes gardent leur chaleur, les vallées accumulent l’air froid, et un jardin en versant nord peut avoir deux semaines de retard sur un autre à un mile de là. Prenez cette page comme point de départ et laissez votre jardin la corriger — c’est exactement à cela que sert le journal de l’application.
Lieux proches
Rappels de semis pour Greensboro
Un mot bref à chaque nouvelle et pleine lune sur ce qui est dans sa fenêtre en ce moment à Greensboro — calculé d’après les dates de gel de cette page. Gratuit, un clic pour arrêter.
We store your address to send the email and nothing else. No ads, never sold, unsubscribe any time. See our privacy policy.
Vous le voulez au jardin, sur votre téléphone ? Moon Phase Garden garde vos dates de gel, vos fenêtres de semis et la phase de lune du soir au même endroit, fonctionne hors ligne, et vous laisse remplacer ces dates par ce que fait vraiment votre jardin. Gratuit et sans publicité.
Disponible sur Google Play · Planifiez une planche · Récolter chaque mois