Les quatre dates qui comptent
| Date | Quand | Ce que cela veut dire |
|---|---|---|
| Dernier gel de printemps (50 %) | Feb 28 | Une année sur deux gèle après cette date. C’est une moyenne, pas une garantie. |
| Dernier gel de printemps (10 %) | Mar 19 | 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 24 | Une année sur deux gèle avant cette date. Les cultures d’automne se comptent à rebours depuis là. |
| Premier gel d’automne (10 %) | Nov 7 | Une année à gel précoce. Si une culture doit finir, visez une récolte avant cette date. |
Semis de printemps et d’été à Shreveport
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 |
|---|---|---|---|---|
| Garlic cloves/sets Mieux vaut semer en automne — voir plus bas |
— | Jan 12 – Feb 12 | Feb 2–7 Waning Gibbous |
240–300 |
| Asparagus (crowns) transplant |
— | Jan 17 – Feb 21 | Jan 25 First Quarter |
perennial — first real harvest 2–3 years |
| Chives either |
Jan 3 | Jan 17 – Feb 21 | Jan 19–24 Waxing Crescent |
75–90 |
| Onion (from sets/transplants) cloves/sets |
— | Jan 17 – Feb 21 | Feb 2–7 Waning Gibbous |
90–120 |
| Peas (English/snap) direct sow |
— | Jan 17 – Feb 21 | Jan 25 First Quarter |
55–75 |
| Spinach direct sow |
— | Jan 17 – Feb 21 | Jan 19–24 Waxing Crescent |
35–50 |
| Cabbage transplant |
Dec 27 | Jan 24 – Feb 21 | Jan 24, Feb 18–21 Waxing Crescent |
65–90 |
| Collards either |
Jan 17 | Jan 24 – Mar 14 | Jan 24, Feb 18–22 Waxing Crescent |
55–85 |
| Kale either |
Jan 17 | Jan 24 – Feb 28 | Jan 24, Feb 18–22 Waxing Crescent |
50–65 |
| Lettuce (leaf) either |
Jan 24 | Jan 24 – Mar 21 | Jan 24, Feb 18–22 Waxing Crescent |
40–55 |
| Potato cloves/sets |
— | Jan 24 – Feb 28 | Feb 1 Full Moon |
70–120 |
| Radish direct sow |
— | Jan 24 – Mar 21 | Feb 2–7 Waning Gibbous |
22–35 |
| Turnip direct sow |
— | Jan 24 – Mar 7 | Feb 2–7 Waning Gibbous |
40–60 |
| Broccoli transplant |
Dec 27 | Jan 29 – Feb 28 | Feb 18–23 Waxing Crescent |
55–80 |
| Brussels Sprouts transplant |
Dec 27 | Jan 29 – Feb 28 | Feb 18–23 Waxing Crescent |
90–110 |
| Leek transplant |
Dec 20 | Jan 29 – Feb 28 | Feb 2–7 Waning Gibbous |
100–120 |
| Lettuce (head) transplant |
Jan 10 | Jan 29 – Feb 28 | Feb 18–23 Waxing Crescent |
60–85 |
| Parsley either |
Dec 27 | Jan 29 – Mar 7 | Feb 18–23 Waxing Crescent |
70–90 |
| Parsnip direct sow |
— | Jan 29 – Mar 7 | Feb 1, Mar 3 Full Moon |
100–150 |
| Shallot cloves/sets Mieux vaut semer en automne — voir plus bas |
— | Jan 29 – Feb 28 | Feb 2–7 Waning Gibbous |
90–120 |
| Beet direct sow |
— | Jan 31 – Mar 21 | Feb 1, Mar 3 Full Moon |
50–65 |
| Kohlrabi either |
Jan 17 | Jan 31 – Mar 7 | Feb 18–23 Waxing Crescent |
45–60 |
| Carrot direct sow |
— | Feb 7 – Mar 21 | Mar 3 Full Moon |
65–85 |
| Cauliflower transplant |
Dec 27 | Feb 7 – Feb 28 | Feb 18–23 Waxing Crescent |
55–80 |
| Cilantro direct sow |
— | Feb 7 – Mar 21 | Feb 18–23 Waxing Crescent |
45–70 |
| Swiss Chard direct sow |
— | Feb 7 – Mar 30 | Feb 18–23 Waxing Crescent |
50–60 |
| Dill direct sow |
— | Feb 14 – Mar 30 | Feb 18–23 Waxing Crescent |
40–60 |
| Cucumber either |
Feb 7 | Feb 28 – Mar 30 | Mar 25 First Quarter |
50–70 |
| Green Beans (bush) direct sow |
— | Feb 28 – Apr 14 | Mar 25 First Quarter |
50–65 |
| Oregano transplant |
Jan 3 | Feb 28 – Mar 21 | — First Quarter |
cut as needed |
| Sage transplant |
Jan 3 | Feb 28 – Mar 21 | — First Quarter |
cut as needed |
| Sweet Corn direct sow |
— | Feb 28 – Apr 14 | Mar 25 First Quarter |
60–100 |
| Thyme transplant |
Jan 3 | Feb 28 – Mar 21 | — First Quarter |
cut as needed |
| Zucchini / Summer Squash either |
Feb 7 | Feb 28 – Mar 30 | Mar 25 First Quarter |
45–60 |
| Basil either |
Jan 17 | Mar 7 – Mar 30 | Mar 19–24 Waxing Crescent |
30–60 |
| Dry Beans direct sow |
— | Mar 7 – Apr 4 | Mar 25 First Quarter |
85–100 |
| Pole Beans direct sow |
— | Mar 7 – Apr 9 | Mar 25 First Quarter |
60–75 |
| Pumpkin direct sow |
Feb 7 | Mar 7 – Apr 4 | Mar 25 First Quarter |
90–120 |
| Rosemary transplant |
Feb 28 | Mar 7 – Mar 30 | Mar 25 First Quarter |
cut as needed |
| Tomatillo transplant |
Jan 17 | Mar 7 – Mar 30 | Mar 25 First Quarter |
60–75 |
| Tomato transplant |
Jan 17 | Mar 7 – Mar 30 | Mar 25 First Quarter |
60–85 |
| Winter Squash direct sow |
Feb 7 | Mar 7 – Apr 4 | Mar 25 First Quarter |
85–110 |
| Cantaloupe / Muskmelon either |
Feb 7 | Mar 14 – Apr 4 | Mar 25 First Quarter |
75–90 |
| Eggplant transplant |
Jan 3 | Mar 14 – Apr 4 | Mar 25 First Quarter |
60–90 |
| Okra direct sow |
Jan 31 | Mar 14 – Apr 9 | Mar 25 First Quarter |
50–70 |
| Pepper transplant |
Jan 3 | Mar 14 – Apr 4 | Mar 25 First Quarter |
60–90 |
| Sweet Potato slips |
— | Mar 14 – Apr 9 | Apr 2–7 Waning Gibbous |
90–150 |
| Watermelon either |
Feb 7 | Mar 14 – Apr 4 | Mar 25 First Quarter |
70–90 |
| Strawberry (crowns) transplant |
— | Dec 30 – Feb 7 | Jan 3, Feb 1 Full Moon |
perennial — first real harvest next season |
Semis d’automne à Shreveport
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 | Jul 9 – Aug 14 | Jul 21 | 60–85 | very tender |
| Brussels Sprouts | Jul 12 – Jul 29 | Jul 15–20 | 90–110 | hardy |
| Potato | Jul 17 – Aug 18 | Jul 29 | 70–120 | semi-hardy |
| Sweet Corn | Jul 22 – Aug 14 | — | 60–100 | tender |
| Pole Beans | Aug 1 – Aug 14 | — | 60–75 | tender |
| Parsley | Aug 4 – Aug 18 | Aug 13–18 | 70–90 | semi-hardy |
| Okra | Aug 6 – Sep 5 | Aug 19 | 50–70 | very tender |
| Cabbage | Aug 11 – Aug 23 | Aug 13–18 | 65–90 | hardy |
| Carrot | Aug 11 – Aug 23 | — | 65–85 | semi-hardy |
| Collards | Aug 11 – Sep 2 | Aug 13–18 | 55–85 | hardy |
| Cucumber | Aug 11 – Aug 24 | Aug 19 | 50–70 | tender |
| Broccoli | Aug 16 – Sep 2 | Aug 16–18 | 55–80 | hardy |
| Cauliflower | Aug 16 – Sep 2 | Aug 16–18 | 55–80 | semi-hardy |
| Green Beans (bush) | Aug 16 – Aug 24 | Aug 19 | 50–65 | tender |
| Lettuce (head) | Aug 16 – Aug 28 | Aug 16–18 | 60–85 | semi-hardy |
| Peas (English/snap) | Aug 16 – Sep 2 | Aug 19 | 55–75 | hardy |
| Beet | Aug 21 – Sep 7 | Aug 27 | 50–65 | semi-hardy |
| Kale | Aug 21 – Sep 7 | — | 50–65 | hardy |
| Swiss Chard | Aug 21 – Sep 7 | — | 50–60 | semi-hardy |
| Zucchini / Summer Squash | Aug 21 – Aug 29 | — | 45–60 | tender |
| Basil | Aug 26 – Sep 13 | Sep 11–13 | 30–60 | very tender |
| Kohlrabi | Aug 26 – Sep 12 | Sep 11–12 | 45–60 | hardy |
| Cilantro | Aug 31 – Sep 12 | Sep 11–12 | 45–70 | semi-hardy |
| Lettuce (leaf) | Aug 31 – Sep 17 | Sep 11–16 | 40–55 | semi-hardy |
| Turnip | Aug 31 – Sep 17 | Aug 31–Sep 3 | 40–60 | hardy |
| Spinach | Sep 5 – Sep 22 | Sep 11–16 | 35–50 | hardy |
| Dill | Sep 10 – Sep 17 | Sep 11–16 | 40–60 | semi-hardy |
| Radish | Sep 10 – Oct 5 | Sep 27–Oct 2 | 22–35 | hardy |
| Garlic | Oct 25 – Dec 15 | Oct 26–31 | 240–300 | hardy |
| Shallot | Nov 8 – Dec 9 | Nov 25–30 | 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 Shreveport Dwtn Ap (GHCN USW00053905), 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 Shreveport
Un mot bref à chaque nouvelle et pleine lune sur ce qui est dans sa fenêtre en ce moment à Shreveport — calculé d’après les dates de gel de cette page. Gratuit, un clic pour arrêter.
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