Hydroponic Calendar

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Hydroponic Microgreens Planting Calendar: Seed to Harvest Timeline

Microgreens are the best proof-of-work crop for a new setup because they can go from seed to harvest in less than two weeks. This guide gives you the timing, system fit, growing ranges, and mistakes to avoid before you add the crop to your calendar.

Microgreens quick numbers

MetricRecommended rangeWhy it matters
DifficultyeasySets expectation before you choose the crop.
Germination2 daysUse this as the first check-in date.
Harvest window7-17 daysThe real date moves with temperature, light, and variety.
Best systemTrayMatches the crop to the equipment style.
pH5.8-6.5Keep nutrient uptake in a forgiving range.
EC0.4-0.8 mS/cmAvoid underfeeding or overfeeding the crop.

Seed to harvest timeline

StageTarget dateWhat to check
SeedDay 0Start Microgreens and save the planted date in the tracker.
GerminationDay 2Look for even sprouting before increasing light intensity.
Transplant or thinDay 10Move into Tray once roots are established.
First harvest windowDay 12-17Cut above the media when the first true leaves begin to show.

Weekly checks for this crop

CheckpointTimingAction
Light checkFirst 3 days after sproutKeep Microgreens compact by lowering weak light or raising intensity slowly.
Nutrient checkWeeklyHold pH around 5.8-6.5 and EC around 0.4-0.8 mS/cm unless the plant shows stress.
Canopy checkMid-cycleKeep spacing near Dense tray seeding so leaves dry between light cycles.
Next sowingDay 7Start the next Microgreens batch before the current one finishes.

Best setup

Microgreens is best for the fastest possible indoor harvest. Use Tray, keep the grow area around 65-75 F, and plan for 10-14 hours after blackout of light.

  • Spacing: Dense tray seeding
  • Harvest: Cut above the media when the first true leaves begin to show.
  • Good varieties: Radish, Broccoli, Pea shoots

Mistakes to avoid

  • Overwatering after germination and inviting mold.
  • Leaving trays stacked too long after the shoots lift.
  • Using weak light and getting stretched, pale stems.

How to schedule the next crop

Do not wait until harvest day to start the next seed. For Microgreens, open the tracker around day 7 and start the next batch if the current crop looks healthy.

This creates a steady indoor rhythm instead of one full harvest followed by an empty system.

When to skip this crop

Skip Microgreens for this cycle if you cannot hold the room near 65-75 F, if the system cannot fit Dense tray seeding, or if your light schedule is far from 10-14 hours after blackout.

FAQ

How long does hydroponic microgreens take from seed to harvest?

Plan around 7-17 days for a beginner indoor setup, with germination usually starting around day 2.

What is the best hydroponic system for microgreens?

Tray is the best default here because it matches the crop size, harvest cycle, and beginner maintenance needs.

What should beginners watch most closely with microgreens?

Overwatering after germination and inviting mold.