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Indoor Tomato Seedlings: Leggy Growth Requires Outdoor Light

Solanum lycopersicum: 3.5-Foot Tall, No Fruit = Insufficient Light

March-sown tomatoes in 18-inch pots, Miracle-Gro soil and fertilizer sticks = nitrogen-fueled vegetative growth, no reproductive trigger.

Fix

  • Move outdoors (porch, terrace, balcony)
  • Full sun + warm air = flowering/fruiting
  • Stop fertilizing—excess N prevents bloom
  • Even moisture, good drainage

Why Indoors Fails

Windows filter UV; intensity too low. Tomatoes need 10+ hours direct sun. Fluorescent lights work only if very close (2-4 inches) and 16+ hours/day.

Container Note

18-inch pots are excellent. Just get them outside.

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