Growing Broad Beans, also Fava bean

View the Broad Beans page

20 Aug 21 Richard Stancliffe (New Zealand - cool/mountain climate)
Are the plants frost tolerant? We get -5degC frosts through to the end of October. I have a dozen 30cm plants to plant out. Cheers
02 Dec 21 Celeste Archer (Canada - Zone 7b Mild Temperate climate)
The kill temperature for Fava Beans ranges from about -4c to -10c depending on the variety. Furthermore the temperature needs to be sustained; that is 2 minutes at -4c will not kill the fava bean plant; neither will an hour (most likely).... but 48 hours of temperatures consistently below -4c might. When the cold temperature is sustained the cells of the plant explode (freeze); it is the "water transportation system" that gets damaged and the plant can't continue. If you are expecting colder than average temperatures (or colder than you expect your fava beans to be able to handle) - you can cover them with plastic (clear if your keeping it on - anything if you are just putting it on top of them overnight). Tent style is best, but umbrella style (no sides) is also helpful. The most difficult time for the plants is usually around 4am when the "dew" settles, if during cold temp days you can get the plants covered overnight not only will the soil help keep them warm, you are keeping that cold morning sweat off them which can really do considerable damage if temps are cold. Also, high winds work like the morning dew; transporting the cold temperatures into the plant more readily.
20 Dec 21 Celeste Archer (Canada - Zone 7b Mild Temperate climate)
I forgot to mention - if you have hummingbirds in your area - fava beans will produce some flowers during your overwintering process and provide some much needed food for humming birds (as do hellebores/lenten roses).
24 Aug 21 Tony (New Zealand - temperate climate)
You can plant anytime and if there is a frost, the plants will fall over but recover, albeit looking a bit unkempt.
26 Aug 21 Richard Stancliffe (New Zealand - cool/mountain climate)
Nice. Thanks Tony
Gardenate App

Put Gardenate in your pocket. Get our app for iPhone, iPad or Android to add your own plants and record your plantings and harvests

Planting Reminders

Join 60,000+ gardeners who already use Gardenate and subscribe to the free Gardenate planting reminders email newsletter.


Home | Vegetables and herbs to plant | Climate zones | About Gardenate | Contact us | Privacy Policy

This planting guide is a general reference intended for home gardeners. We recommend that you take into account your local conditions in making planting decisions. Gardenate is not a farming or commercial advisory service. For specific advice, please contact your local plant suppliers, gardening groups, or agricultural department. The information on this site is presented in good faith, but we take no responsibility as to the accuracy of the information provided.
We cannot help if you are overrun by giant slugs.