Bed & Balcony
Garden care / Tomato

Observation and action checklist

Tomatoes splitting after rain: check the watering pattern

Compare stem-end cracks with other fruit damage, review moisture changes, and keep a short record of the next developing fruit.

Compare what you can see

Cracks radiate from the stem or form rings around it

Compare the pattern with recent rain and watering. Growth cracking is a possibility; photograph one fruit while the damage is fresh.

The mark is a dry, corky scar at the blossom end

A scarred, misshapen fruit needs a different comparison from a newly opened stem-end crack. Record the shape and when it first appeared.

The damaged area is soft, spreading or visibly moldy

Do not treat it as a simple watering issue. Separate affected fruit from the harvest and seek local guidance if the cause is unclear.

Your next care visit

Check off what you have reviewed. Use the downloadable sheet to keep your observations.

  1. Write down the last dry spell, heavy rain and irrigation. Compare pots with beds, and exposed pots with sheltered ones. Note whether the problem is on one cultivar or several.

  2. Use a finger or a small probe to check below the surface in the same place each visit. Record dry, moist or wet. Keep moisture steadier with appropriate watering and mulch; a fixed daily volume cannot account for every pot and weather change.

  3. Label a still-intact fruit cluster and compare later fruit with the original photograph. Judge the next developing fruit rather than expecting an existing split to disappear. Keep a cultivar note for the next planting.

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Keep this in mind

Do not respond to every crack by adding fertilizer or repeatedly soaking already wet roots. Keep the observations separate: fruit pattern, soil moisture and recent weather.

What to record next

At your next watering check, inspect moisture before watering and photograph the same fruit cluster. If other plant parts also show damage, record those changes for a local extension adviser.

  • Cultivar and pot/bed location
  • Date first noticed and affected fruit stage
  • Crack location: stem rings / stem rays / other
  • Recent dry spell, rain and irrigation
  • Root-zone moisture before watering
  • Photo reference and condition of next fruit cluster

Review your tomato container plan →

References and scope

Use these extension references to compare symptoms and check crop care. Match planting advice to your variety and local growing conditions.

Reviewed October 20, 2026.

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