1. Survey any plant damage
Take a survey of any leaf or stem damage that may have occurred. If there is minimal damage to leaves, you may be able to just remove them. Keep an eye on plants that have received moderate or heavy damage over the next couple days , the plant might be able to recuperate. Try to stake up plants that are now leaning. If the main stem of a plant has snapped then more than likely it is a loss. You can try grafting the stem back together. There is no guarantee the plant will survive, but you can try to salvage it.
2. Try to avoid walking right next to the plants while the soil is saturated
During this time plants, and root systems, are very vulnerable to damage from stepping on them. Walking near plants can also cause soil impaction, which can limit root growth. This is not a big concern if you have a well designed raised bed garden where you can reach each plant without stepping near them.
3. During the storm (or soon after) look for areas that may be draining poorly
You do not want areas of long standing water in the vegetable garden. This can be very bad for plants, and could lead to root rot. If you find areas that drain poorly, create ways to get the water to drain away from the vegetable garden. You could implement dry creek beds (rock beds) or use plastic water drains to redirect water from the vegetable garden.
4. Keep an eye out for fungal or bacterial diseases
Damp, humid conditions are perfect for fungal and bacterial disease development. Diseases, such as powdery mildew, will spread very quickly in these conditions. Treat these diseases as soon as they are noticed. Waiting too long to act can mean serious trouble for your vegetable plants.
5. Eliminate possible slug or snail hiding places
Slugs and snails love damp places that have hiding areas. Remove any boards, stones, or other items that are laying around in or around the garden.
6. Check for any exposed roots due to soil erosion
If you find exposed roots, cover them with soil or compost as soon as possible. Do not let the roots dry out – this could be catastrophic to the plant.
7. Keep an eye on emerging weeds
Weeds love to pop up soon after a storm. The sudden charge of moisture to the soil will encourage weeds to spring up almost overnight. Put down some type of mulch to prevent weeds and to help ease soil erosion.
8. After a very heavy rain you may need to replenish nutrients
Having heavy water runoff can carry nutrients from the soil. Make sure to replenish these nutrients with fish emulsion or an organic all-purpose fertilizer.
9. Empty any containers that have collected water
Overturn any buckets, wheelbarrows, or pot saucers that contain rainwater. These are breeding grounds for mosquitoes. If you have a rain barrel, you could dump the rainwater in there.