Homepage → Seed Related Topics → Days Required for Vegetable Seedling Emergence at Various Soil Temperatures
Days Required for Vegetable Seedling Emergence at Various Soil Temperatures
Planted December 17, 2013
Last tended to on October 11, 2024
Reading time: 3 minutes
| Vegetable | 32 | 41 | 50 | 68 | 77 | 86 | 95 | 104 |
|---|---|---|---|---|---|---|---|---|
| Artichoke | - | - | - | - | - | 14-21 | - | - |
| Asparagus | NG | NG | 53 | 24 | 15 | 10 | 12 | 20 |
| Bean, Fava | - | - | - | 7 | 7 | - | - | - |
| Bean, Green | NG | NG | NG | 16 | 11 | 8 | 6 | NG |
| Bean, Lima | - | - | NG | 31 | 18 | 7 | 7 | NG |
| Beet | - | 42 | 17 | 10 | 6 | 5 | 5 | 5 |
| Broccoli | - | - | 20 | 10 | 6 | 5 | 5 | - |
| Cabbage | - | - | 15 | 9 | 6 | 5 | 4 | - |
| Cantaloupe / Muskmelon | - | - | - | - | 8 | 4 | 3 | - |
| Carrot | NG | 51 | 17 | 10 | 7 | 6 | 6 | 9 |
| Cauliflower | - | - | 20 | 10 | 6 | 5 | 5 | - |
| Celery | NG | 41 | 16 | 12 | 7 | NG | NG | NG |
| Corn (Maize) | NG | NG | 22 | 12 | 7 | 4 | 4 | 3 |
| Cucumber | NG | NG | NG | 13 | 6 | 4 | 3 | 3 |
| Eggplant | - | - | - | - | 13 | 8 | 5 | - |
| Lettuce | 49 | 15 | 7 | 4 | 3 | 2 | 3 | NG |
| Okra | NG | NG | NG | 27 | 17 | 13 | 7 | 6 |
| Onion | 136 | 31 | 13 | 7 | 5 | 4 | 4 | 13 |
| Parsley | - | - | 29 | 17 | 14 | 13 | 12 | - |
| Parsnip | 172 | 57 | 27 | 19 | 14 | 15 | 32 | NG |
| Pea | - | 36 | 14 | 9 | 8 | 6 | 6 | - |
| Pea, Southern | - | - | 14 | 10 | 8 | 7 | - | - |
| Pepper | NG | NG | NG | 25 | 13 | 8 | 8 | 9 |
| Pumpkin | - | - | - | - | 15 | 6 | 4 | 3 |
| Radish | NG | 29 | 11 | 6 | 4 | 4 | 3 | - |
| Soybean | NG | NG | NG | NG | - | 7 | 7 | - |
| Spinach | 63 | 23 | 12 | 7 | 6 | 5 | 6 | NG |
| Squash | - | - | - | - | 15 | 6 | 4 | 3 |
| Swiss Chard | - | - | 20 | 15 | 12 | 10 | 7 | NG |
| Tomato | NG | NG | 43 | 14 | 8 | 6 | 6 | 9 |
| Turnip | NG | NG | 5 | 3 | 2 | 1 | 1 | 1 |
| Watermelon | - | NG | - | - | 12 | 5 | 4 | 3 |
Soil Temperature (in degrees Fahrenheit)
NG = No Germination
- = Not Tested
Notes:
- Germination is a complex biological process triggered by environmental conditions specific to the species, and even by cultivar. Temperature is but one of the variables.
- Cooler soil temperatures cause seeds to remain dormant increasing their vulnerability to disease, insects and animals.
- More days are required with deeper seeding because of cooler temperatures and the greater distance of growth. Sowing too deep can also prevent germination.
- Optimal germination temperature is not necessarily the optimal field sowing temperature. For example, many brassicas germinate quickly at higher temperatures but if you wait until these climate conditions occur, the plants will be growing at the wrong time of the season.
References:
- “Vegetable Seed Germination,” J. F. Harrington and P. A. Minges, California Agricultural Extension Leaflet, 1954.
- “Managing Cover Crops Profitably, 3rd Edition,” USDA SARE, p.125, 2012.
- “Modeling the Effect of Temperature on the Germination Speed in Some Legume Crops,” Ahmet Balkaya, Journal of Agronomy, 3: 179-183, 2004.
- “Comparative Germination Responses of Cowpea and Maize Genotypes to Soil Moisture Content,” Abayomi, Y.A. and Adeniyi A.M., Agrosearch Vol. 7 (1&2) 2005: pp. 34-42.
Learn more about …
Copyright © 1998 - 2024 - All rights reserved
WebGrower.com℠ is a service mark of Victory Horticultural Group, LLC.
• Privacy Statement •
This site participates in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.