Can microgreens be grown indoors year-round?

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

Cultivating microgreens in any environment, indoors throughout the year, allows for anywhere to be the start of a productive garden. You can find good growing conditions, regardless of what is happening outside. Simple environmental controls will allow for consistency in harvesting. I've picked fresh greens on the coldest blizzard days and the hottest, record-breaking waves.

Your seasonal adjustments provide uninterrupted development with extreme temperatures. Winter has heating mats under trays to maintain a temperature of 65-75°F. During the summer, higher ventilation is needed to manage air humidity. These changes replicate the ideal environmental conditions that nature provides in the spring and fall.

Winter Setup

  • Place seedling heat mats under trays for consistent root-zone warmth
  • Extend LED lighting to 16 hours daily compensating for weak sunlight
  • Group trays together to create beneficial microclimates

Summer Management

  • Run oscillating fans 8 hours daily preventing humidity buildup
  • Position trays away from direct AC vents avoiding dehydration
  • Water during cooler morning hours reducing evaporation

Lighting systems account for varying daylight lengths throughout the seasons. Operationally, LED panels offer steady intensity in dark winters. In summer, light diffusers prevent plants from burning. I adjust the fixture height weekly to accommodate growth. This consistency yields uniform harvests.

Seasonal Challenge Solutions
ChallengeWinter cold stressEquipment FixWaterproof seedling heat matCost
$15-25
ChallengeSummer humidityEquipment FixClip-on circulation fanCost
$10-20
ChallengeLow winter lightEquipment FixFull-spectrum LED panelCost
$25-40
ChallengeSummer overheatingEquipment FixLight-diffusing fabricCost
$5-10

Cultivating year-round is very economical compared to buying produce from a store. The initial equipment outlay is recovered within 3 harvest cycles. My kitchen produces $50 worth of greens using $5 worth of electricity per month. Considering these factors, healthy nutrition becomes achievable regardless of income.

Begin with one tray and experiment with the changes in season. As you learn to control your environment, expand slowly. You will reap the rewards with a continuous supply of fresh harvests. If you are wondering if it is snowing or pouring outside your window, the answer is a big yes, and your harvest is waiting.

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

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