What are common mistakes beginners make?

Published: September 18, 2025
Updated: September 18, 2025

In the beginning, beginner mistakes are common and predictable for growing microgreens, but knowing what they are in advance can save you frustration. First is overwatering, which brings fungus problems within days. Second, lack of light leads to weak, skinny seedlings that flop. Third, overcrowded seeds result in impaired growth, while an improper harvest impacts yield.

Watering Errors

  • Overwatering causes mold: Use bottom-watering instead of top spraying
  • Underwatering stunts growth: Check soil moisture twice daily
  • Solution: Maintain wrung-sponge soil consistency always

Lighting Issues

  • Weak light causes leggy growth: Position LEDs 2-4 inches above plants
  • Inconsistent exposure: Rotate trays 180° each morning
  • Solution: Provide 12-16 hours daily light minimum

Planting Mistakes

  • Overseeding causes crowding: Leave hairline gaps between seeds
  • Wrong depth: Surface-plant seeds without burying
  • Solution: Use salt-shaker distribution technique
Mistake Identification Guide
MistakeOverwateringVisual SignsWhite mold on soil surfaceImmediate Fix
Stop watering, increase airflow
MistakeInsufficient lightVisual SignsPale, stretched seedlingsImmediate Fix
Lower lights immediately
MistakeDense plantingVisual SignsTangled roots, slow growthImmediate Fix
Thin seedlings carefully
MistakeEarly harvestingVisual SignsSparse cotyledonsImmediate Fix
Wait 2-3 more days

Mistakes with harvest timing can cost weeks of work. New growers often harvest greens prematurely when cotyledons are present. Remember to wait at least until the true leaves are opened up to obtain maximum nutrition and flavor. Waiting too long causes greens to develop a bitter taste. I reference my calendar with crop-specific harvest dates.

Avoid these problems with daily observation routines. Inspect trays morning and evening for any early warning signs. Measure seedling height every other day. Adjust care immediately when problems arise. This vigilance can take anyone new to growing to a confident producer in no time.

Begin with forgiving crops, such as radishes and pea shoots, as they are more forgiving of novice errors than brassicas and other delicate greens. It's a good idea to keep a garden journal of your trials and successes. In terms of timing, you should notice an improvement in your skills after three harvests.

Read the full article: How to Grow Microgreens Indoors at Home

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