What kinds of extreme weather threaten crops?
Late frost, heat waves, hail, high wind, flooding, heavy rain and drought are the main threats. Each hits different crops and stages of growth in different ways. Blossoms and seedlings are often the most fragile, while mature plants may tolerate more.
Knowing your local risks comes first. Records of past damage, advice from long-time neighbors and local climate summaries show which threats come most often to your farm.
Soil that is healthy and covered handles stress better. Mulch, cover crops and organic matter can buffer temperature swings and help hold moisture, though results vary. Your NRCS service center can give advice that suits your soil.
How do I protect against frost?
Watch forecasts closely in spring and fall, and remember that cold air pools in low spots. Row covers, blankets, cloches and other coverings can add some protection when put on before sunset and secured against wind. Watering before a freeze is sometimes recommended for certain situations, so check with Extension for your crop.
I will not give temperature thresholds, since they depend on crop and stage. Your Extension office publishes guidance on which temperatures harm which plants.
Frost damage is not always obvious right away. Leaves may look fine in the evening and turn dark the next day. Wait before pruning or tearing out plants, and ask Extension how to judge recovery for your crop.
- Cover before dusk and secure edges
- Know your frost pockets
- Check crop-specific limits with Extension
- Remove covers when conditions allow
How do I protect against heat?
Shade cloth, mulch, irrigation timing and windbreaks all help. Water in the early morning so plants have moisture during the hottest hours. Avoid working fields during peak heat when possible, and look after yourself and your workers.
Heat illness is dangerous for people. Rest in the shade, drink water and seek medical care if anyone shows confusion, fainting or severe symptoms.
In hot weather, many crops drop flowers or set poor fruit even when they look healthy. Keep watering steady, provide shade where practical and be patient, because the plants may recover when temperatures ease.
What about hail, wind and flood?
Hail and wind damage are hard to prevent, but some growers use netting, supports, staking or sheltered placement. Flooding calls for good drainage, raised beds and keeping stored products and chemicals out of low areas.
After flooding, ask your Extension agent or county health department about the safety of produce that has touched flood water. Do not assume it is safe to sell or eat.
Wind can break stems, dry foliage and blow over young plants. Windbreaks, supports and sheltered placement help. Heavy rain can also splash soil-borne disease onto leaves, so mulching helps in some systems.
How do I plan across the season?
Spread risk with staggered plantings, different varieties and several fields. Keep materials such as row cover, stakes and tarps ready before you need them. Make a short checklist for each type of event, so that tired people can follow it at night.
Watch the forecast and the National Weather Service alerts for your county. Sign up for text or radio alerts, and set a time each evening to check conditions.
Keep clear written notes about each event, including what you did and how plants responded. Those notes make your next response faster and more confident.
What should I do after damage happens?
Take photographs and notes before cleaning up. Wait a few days to see how plants respond, since some recover better than they first appear. Ask your Extension agent for advice about replanting, treatment and what to do with damaged produce.
If you have crop insurance or may qualify for a USDA program, contact your agent or local Farm Service Agency office quickly, because reporting windows can be short. Ask what they require.
How can I get ready ahead of time?
Prepare a storm box. Put row cover, clips, stakes, twine, tarps, flashlights and a copy of your checklist in one place. Check supplies each spring and replace what has worn out.
Identify your most valuable and most vulnerable crops, and decide which you will protect first if time or labor is short. It is better to save a few important plantings than to spread thin over everything.
Line up help in advance. A neighbor, family member or friend who knows the plan can cover a field while you cover another. Make sure each person knows where supplies are kept.
- Storm box with supplies
- Rank crops by value and risk
- Arrange extra hands
- Review the checklist each season
Key takeaways
- Know the threats most likely on your farm and the stages most at risk.
- Prepare covers, supplies and checklists before the event.
- Use crop-specific guidance from Extension for temperature limits.
- Document damage and contact insurance or FSA quickly.
Sources and further reading
Last reviewed: November 12, 2026. Written by the Rural Farm Life Editorial Team. See our editorial policy.