To achieve the best results, water tomato plants deeply and infrequently, rather than shallowly and frequently. Drip systems provide water right to the roots. Always water before 10 a.m. to reduce evaporation loss. Some soils retain moisture more effectively than others. Allow the soil to dry slightly between watering. I check the soil moisture with a finger test. Consistent moisture helps reduce fruit splitting and blossom end rot.
Seedlings & Transplants
- Water lightly daily for first 10 days
- Keep soil consistently moist not soggy
- Use gentle spray to avoid disturbing roots
- Morning watering prevents damping-off disease
- Reduce frequency after roots establish
Fruiting Stage
- Deep water every 3-4 days
- Provide 1-1.5 inches water weekly
- Increase during heatwaves above 85°F
- Mulch to retain soil moisture
- Check soil at 4-inch depth before watering
Accurate soil moisture measurement is important. Stick your finger 2-4 inches deep. If that area is dry, then it needs to be watered. Use moisture meters for accuracy. I have one next to my tomato beds. Container tomatoes require more frequent watering. Check them in hot weather daily. Containers dry faster than garden soil.
Watch for signs of overwatering: it is very normal for a plant to wilt in the afternoon heat. If the plant wilts in the morning however, it is time to water now. Yellow leaves are a sign of too much water. Cracked fruit results from inconsistent moisture levels. I take photos of symptoms for later reference. Modify your watering schedule based on what the plant is asking for.
Use water-saving strategies. Install rain barrels for free water. Use soaker hoses under mulch. Group plants with similar water needs together. I have my tomatoes on a separate watering cycle from the waterwise herbs I'm growing. Stormwater capture is done during spring storms. Water conservation practices also save resources to improve your tomato health.
Read the full article: 10 Common Tomato Diseases and Prevention Tips
