Las cuatro fechas que importan
| Fecha | Cuándo | Qué significa |
|---|---|---|
| Última helada de primavera (50 %) | Mar 30 | La mitad de los años hiela después de esta fecha. Es una media, no una garantía. |
| Última helada de primavera (10 %) | Apr 15 | Solo un año de cada diez hiela después de esta fecha. Úsala para lo que no puedas permitirte replantar. |
| Primera helada de otoño (50 %) | Nov 4 | La mitad de los años hiela antes de esta fecha. Los cultivos de otoño se cuentan hacia atrás desde aquí. |
| Primera helada de otoño (10 %) | Oct 23 | Un año de helada temprana. Si un cultivo tiene que terminar, apunta a cosechar antes de esta fecha. |
Siembra de primavera y verano en Concord
Las fechas se calculan con la última helada de este lugar, no con una tabla genérica por zona. Los «mejores días lunares» son los días de cada ventana que caen en la fase tradicional del cultivo, la misma regla que usa la app.
| Cultivo | Sembrar dentro | Plantar fuera | Mejores días lunares | Días hasta la cosecha |
|---|---|---|---|---|
| Strawberry (crowns) transplant |
— | Jan 29 – Mar 9 | Feb 1, Mar 3 Full Moon |
perennial — first real harvest next season |
| Garlic cloves/sets Mejor sembrarlo en otoño: mira abajo |
— | Feb 11 – Mar 14 | Mar 4–9 Waning Gibbous |
240–300 |
| Asparagus (crowns) transplant |
— | Feb 16 – Mar 23 | Feb 24 First Quarter |
perennial — first real harvest 2–3 years |
| Chives either |
Feb 2 | Feb 16 – Mar 23 | Feb 18–23 Waxing Crescent |
75–90 |
| Onion (from sets/transplants) cloves/sets |
— | Feb 16 – Mar 23 | Mar 4–9 Waning Gibbous |
90–120 |
| Peas (English/snap) direct sow |
— | Feb 16 – Mar 23 | Feb 24 First Quarter |
55–75 |
| Spinach direct sow |
— | Feb 16 – Mar 23 | Feb 18–23 Waxing Crescent |
35–50 |
| Cabbage transplant |
Jan 26 | Feb 23 – Mar 23 | Feb 23, Mar 19–23 Waxing Crescent |
65–90 |
| Collards either |
Feb 16 | Feb 23 – Apr 13 | Feb 23, Mar 19–23 Waxing Crescent |
55–85 |
| Kale either |
Feb 16 | Feb 23 – Mar 30 | Feb 23, Mar 19–23 Waxing Crescent |
50–65 |
| Lettuce (leaf) either |
Feb 23 | Feb 23 – Apr 20 | Feb 23, Mar 19–23 Waxing Crescent |
40–55 |
| Potato cloves/sets |
— | Feb 23 – Mar 30 | Mar 3 Full Moon |
70–120 |
| Radish direct sow |
— | Feb 23 – Apr 20 | Mar 4–9 Waning Gibbous |
22–35 |
| Turnip direct sow |
— | Feb 23 – Apr 6 | Mar 4–9 Waning Gibbous |
40–60 |
| Broccoli transplant |
Jan 26 | Feb 28 – Mar 30 | Mar 19–24 Waxing Crescent |
55–80 |
| Brussels Sprouts transplant |
Jan 26 | Feb 28 – Mar 30 | Mar 19–24 Waxing Crescent |
90–110 |
| Leek transplant |
Jan 19 | Feb 28 – Mar 30 | Mar 4–9 Waning Gibbous |
100–120 |
| Lettuce (head) transplant |
Feb 9 | Feb 28 – Mar 30 | Mar 19–24 Waxing Crescent |
60–85 |
| Parsley either |
Jan 26 | Feb 28 – Apr 6 | Mar 19–24 Waxing Crescent |
70–90 |
| Parsnip direct sow |
— | Feb 28 – Apr 6 | Mar 3, Apr 1 Full Moon |
100–150 |
| Shallot cloves/sets Mejor sembrarlo en otoño: mira abajo |
— | Feb 28 – Mar 30 | Mar 4–9 Waning Gibbous |
90–120 |
| Beet direct sow |
— | Mar 2 – Apr 20 | Mar 3, Apr 1 Full Moon |
50–65 |
| Kohlrabi either |
Feb 16 | Mar 2 – Apr 6 | Mar 19–24 Waxing Crescent |
45–60 |
| Carrot direct sow |
— | Mar 9 – Apr 20 | Apr 1 Full Moon |
65–85 |
| Cauliflower transplant |
Jan 26 | Mar 9 – Mar 30 | Mar 19–24 Waxing Crescent |
55–80 |
| Cilantro direct sow |
— | Mar 9 – Apr 20 | Mar 19–24 Waxing Crescent |
45–70 |
| Swiss Chard direct sow |
— | Mar 9 – Apr 29 | Mar 19–24 Waxing Crescent |
50–60 |
| Dill direct sow |
— | Mar 16 – Apr 29 | Mar 19–24 Waxing Crescent |
40–60 |
| Cucumber either |
Mar 9 | Mar 30 – Apr 29 | Apr 23 First Quarter |
50–70 |
| Green Beans (bush) direct sow |
— | Mar 30 – May 14 | Apr 23 First Quarter |
50–65 |
| Oregano transplant |
Feb 2 | Mar 30 – Apr 20 | — First Quarter |
cut as needed |
| Sage transplant |
Feb 2 | Mar 30 – Apr 20 | — First Quarter |
cut as needed |
| Sweet Corn direct sow |
— | Mar 30 – May 14 | Apr 23 First Quarter |
60–100 |
| Thyme transplant |
Feb 2 | Mar 30 – Apr 20 | — First Quarter |
cut as needed |
| Zucchini / Summer Squash either |
Mar 9 | Mar 30 – Apr 29 | Apr 23 First Quarter |
45–60 |
| Basil either |
Feb 16 | Apr 6 – Apr 29 | Apr 18–22 Waxing Crescent |
30–60 |
| Dry Beans direct sow |
— | Apr 6 – May 4 | Apr 23 First Quarter |
85–100 |
| Pole Beans direct sow |
— | Apr 6 – May 9 | Apr 23 First Quarter |
60–75 |
| Pumpkin direct sow |
Mar 9 | Apr 6 – May 4 | Apr 23 First Quarter |
90–120 |
| Rosemary transplant |
Mar 30 | Apr 6 – Apr 29 | Apr 23 First Quarter |
cut as needed |
| Tomatillo transplant |
Feb 16 | Apr 6 – Apr 29 | Apr 23 First Quarter |
60–75 |
| Tomato transplant |
Feb 16 | Apr 6 – Apr 29 | Apr 23 First Quarter |
60–85 |
| Winter Squash direct sow |
Mar 9 | Apr 6 – May 4 | Apr 23 First Quarter |
85–110 |
| Cantaloupe / Muskmelon either |
Mar 9 | Apr 13 – May 4 | Apr 23 First Quarter |
75–90 |
| Eggplant transplant |
Feb 2 | Apr 13 – May 4 | Apr 23 First Quarter |
60–90 |
| Okra direct sow |
Mar 2 | Apr 13 – May 9 | Apr 23 First Quarter |
50–70 |
| Pepper transplant |
Feb 2 | Apr 13 – May 4 | Apr 23 First Quarter |
60–90 |
| Sweet Potato slips |
— | Apr 13 – May 9 | May 2–7 Waning Gibbous |
90–150 |
| Watermelon either |
Mar 9 | Apr 13 – May 4 | Apr 23 First Quarter |
70–90 |
Siembra de otoño en Concord
Las fechas de otoño se cuentan hacia atrás desde la primera helada y añaden tiempo por el «factor de otoño»: los días se acortan y refrescan, así que el cultivo crece más despacio de lo que promete el sobre. Sembrar tarde es la forma más común de que falle un huerto de otoño.
| Cultivo | Sembrar o trasplantar | Mejores días lunares | Días hasta la cosecha | Resistencia al frío |
|---|---|---|---|---|
| Tomato | Jun 19 – Jul 25 | Jun 21, Jul 21 | 60–85 | very tender |
| Brussels Sprouts | Jun 22 – Jul 9 | — | 90–110 | hardy |
| Potato | Jun 27 – Jul 29 | Jun 29, Jul 29 | 70–120 | semi-hardy |
| Sweet Corn | Jul 2 – Jul 25 | Jul 21 | 60–100 | tender |
| Pole Beans | Jul 12 – Jul 25 | Jul 21 | 60–75 | tender |
| Parsley | Jul 15 – Jul 29 | Jul 15–20 | 70–90 | semi-hardy |
| Okra | Jul 17 – Aug 16 | Jul 21 | 50–70 | very tender |
| Cabbage | Jul 22 – Aug 3 | — | 65–90 | hardy |
| Carrot | Jul 22 – Aug 3 | Jul 29 | 65–85 | semi-hardy |
| Collards | Jul 22 – Aug 13 | Aug 13 | 55–85 | hardy |
| Cucumber | Jul 22 – Aug 4 | — | 50–70 | tender |
| Broccoli | Jul 27 – Aug 13 | Aug 13 | 55–80 | hardy |
| Cauliflower | Jul 27 – Aug 13 | Aug 13 | 55–80 | semi-hardy |
| Green Beans (bush) | Jul 27 – Aug 4 | — | 50–65 | tender |
| Lettuce (head) | Jul 27 – Aug 8 | — | 60–85 | semi-hardy |
| Peas (English/snap) | Jul 27 – Aug 13 | — | 55–75 | hardy |
| Beet | Aug 1 – Aug 18 | — | 50–65 | semi-hardy |
| Kale | Aug 1 – Aug 18 | Aug 13–18 | 50–65 | hardy |
| Swiss Chard | Aug 1 – Aug 18 | Aug 13–18 | 50–60 | semi-hardy |
| Zucchini / Summer Squash | Aug 1 – Aug 9 | — | 45–60 | tender |
| Basil | Aug 6 – Aug 24 | Aug 13–18 | 30–60 | very tender |
| Kohlrabi | Aug 6 – Aug 23 | Aug 13–18 | 45–60 | hardy |
| Cilantro | Aug 11 – Aug 23 | Aug 13–18 | 45–70 | semi-hardy |
| Lettuce (leaf) | Aug 11 – Aug 28 | Aug 13–18 | 40–55 | semi-hardy |
| Turnip | Aug 11 – Aug 28 | — | 40–60 | hardy |
| Spinach | Aug 16 – Sep 2 | Aug 16–18 | 35–50 | hardy |
| Dill | Aug 21 – Aug 28 | — | 40–60 | semi-hardy |
| Radish | Aug 21 – Sep 15 | Aug 29–Sep 3 | 22–35 | hardy |
| Garlic | Oct 5 – Nov 25 | Oct 27–31, Nov 25 | 240–300 | hardy |
| Shallot | Oct 19 – Nov 19 | Oct 27–31 | 90–120 | hardy |
De dónde salen estos números
No hay ninguna estación meteorológica con registro largo dentro de Concord, así que estas fechas de helada son modeladas, no observadas. Salen de una malla climática de medio grado construida ajustando las fechas de helada de 6.808 estaciones de la NOAA (normales 1991–2020) contra el terreno y el ráster de rusticidad del USDA de 2023, y leyendo luego la celda en la que cae tu ciudad. Contrastado con las propias estaciones, ese modelo acierta con una semana de margen de media, y su zona coincide exactamente con la de la estación el 67 % de las veces y dentro de media zona el 97 %. Una celda cubre unas 35 por 28 millas, así que esto es una respuesta de barrio, no de patio trasero. Si hay una ubicación con estación real cerca de ti, prefiérela.
¿Qué precisión tiene todo esto?
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.
Sobre la estación en sí: una estación meteorológica es un punto. Las ciudades retienen el calor, los valles acumulan aire frío y un huerto en ladera norte puede ir dos semanas por detrás de otro a una milla. Toma esta página como punto de partida y deja que tu propio huerto la corrija: para eso está el diario de la app.
Lugares cercanos
Avisos de siembra para Concord
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