Hydroponic Growing Kit

Lemon balm

1

Set Up Your Kit

  1. 01 Choose the growing location

    Choose the growing location

  2. 02 Add water and nutrient

    Add water and nutrient

  3. 03 Plant the seeds

    Plant the seeds

  4. 04 Start the light schedule

    Start the light schedule

2

Stage Guide

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Germination

Usually 7–14 days.

Two rounded seed leaves open while a pale root extends through the plug.

  • WaterBegin at 16 fl oz. At about 8 fl oz, add plain water back to 16 fl oz.
  • NutrientUse 0.5 mL per 16 fl oz at setup; do not add another dose during germination.
  • LightProvide 12–14 hours under a grow light, followed by 10–12 hours of darkness.
  • What to doKeep warm. Check each hole through day 14 and reseed any empty hole.
  • Ready for next stageSeed leaves are open and the first pair of true leaves is beginning to form.
3

Rules That Apply at Every Stage

  • Provide 12–14 hours of grow light daily, followed by 10–12 hours of darkness.
  • When the jar reaches about 8 fl oz, add plain water back to 16 fl oz. Never exceed 16 fl oz.
  • Refresh the nutrient solution every 2–3 weeks; add the stage-specific nutrient dose only during a complete refresh.
  • Between complete refreshes, add plain water only; do not add extra nutrient.
  • Keep the cork sleeve on to shade roots and the reservoir, and rotate the jar one-quarter turn weekly.
  • Shake ClearGro Indoor Plant Nutrient (3-2-5) before every use.
  • Maintain 65–75°F (18–24°C); avoid prolonged cool conditions below 60°F (16°C). Use ordinary indoor airflow and keep the plant away from heating or cooling vents.
4

Harvest & Regrow

Harvest usable growth

Cut above a leaf pair, leaving two healthy pairs below; remove flower buds promptly.

Encourage regrowth

Keep healthy foliage after cutting and allow fresh side shoots to expand below cuts.

5

Regrow or Restart

Option A — Continue the same plant

Continue selective harvesting while preserving healthy foliage and the plant's growing points. At the next complete refresh, use the established-plant dose for this crop. Replace the plant when growth becomes weak, leaf quality declines, or root health deteriorates.

Option B — Start a new cycle

Discard the old plant, plug, and roots. Wash and rinse the jar, band, net pot, and wick. Install a fresh plug and seeds, then return to the setup steps. Do not reuse the old plug.

6

Troubleshooting

No sprout by day 14

Confirm moderate temperature, 12–14 hours of light, and the 16 fl oz water level. Place one fresh seed in each empty hole.

Tall, weak seedlings

Increase usable light, move the lamp closer without touching leaves, rotate the jar weekly, and retain only the strongest single plant.

Yellow or pale leaves

Check light, roots, water level, and the stage-specific ClearGro 3-2-5 schedule. Do not add an unplanned nutrient dose.

White fuzz or mold on plug

Remove visible growth gently, improve airflow, and avoid pouring water onto the plug. Replace the plug if growth is widespread, smells sour, or seedlings decline.

Brown, slimy roots or odor

Discard badly damaged roots, wash the jar, replace the solution, keep the reservoir shaded by the sleeve, and ensure the level does not exceed 16 fl oz.

Green algae

Keep the cork sleeve on, block light from the reservoir, and clean the jar during the next solution refresh.

Long stems with wide gaps

Increase usable light, rotate the jar weekly, and raise the lamp as needed without allowing foliage to touch it.

New leaves remain small

Harvest usable foliage and remove flower buds promptly. If flowering/bolting continues and leaf quality declines, restart with a fresh plug.

Leaf edges look scorched

Increase the distance from the grow light and confirm the nutrient was measured correctly; do not add extra nutrient.

7

Simple Weekly Check

  • Confirm the light timer works and leaves do not touch the lamp.
  • Keep water between the 8 fl oz action point and the 16 fl oz maximum fill line.
  • Check that roots are pale and fresh-smelling, not brown, slimy, or foul-smelling.
  • Retain the strongest single lemon balm plant.
  • Use 0.5 mL per 16 fl oz during germination/seedling growth, then the stage-specific established dose only at complete refreshes.
  • Keep the sleeve on and remove flower buds promptly when the guide recommends it.