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Symptom

Plant not producing

Low yields usually trace back to too much nitrogen, poor pollination, heat, too little sun, or picking too little so the plant stops.

Start with light and feeding, then look at the flowers.

Likely causes

Ordered from the usual answer to the less likely one. Each links to the full problem.

  1. A lush, dark green pepper plant with many leaves and no fruit Soil & nutrients Common

    Too much nitrogen

    Lush leaves, few flowers.
  2. A courgette with a withered flower and a shrivelling fruit Fruiting Common

    Poor pollination

    Flowers form but fruit does not follow.
  3. A tomato plant wilting in a hot, dry bed Light & temperature Possible

    Heat stress

    Flowers drop in hot spells.
  4. Pale, leggy seedlings stretching towards a window Light & temperature Possible

    Too little light

    Growing in too much shade.