Age Old Feeding Schedule

About Age Old Organics

Age Old Organics makes organic-based liquid fertilizers, which puts it in an unusual middle ground: the convenience of bottled feed with inputs derived from natural sources rather than mineral salts. For growers who want to feed organically but do not want to manage a dry-amendment soil build, this is the practical compromise.

The line is deliberately small — a grow, a bloom, and a handful of supporting products — and the schedule reflects that.

The feeding schedule

Advanced feed schedule

Advanced Feed Schedule (12-week) — Rates per gallon of water (RO preferred); feed once a week or every third watering. 1 tsp = 5 mL, 1 TBSP = 3 tsp (15 mL).
Product Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 Week 9 Week 10 Week 11 Week 12
Grow 1-2 tsp 2-3 tsp 1 TBSP 1 TBSP 1-2 tsp — — — — — — FLUSH
Bloom — — — — 1-2 tsp 1 TBSP 1 TBSP 1 TBSP 1 TBSP 1 TBSP 1 TBSP FLUSH
Fish & Seaweed — 0.5 tsp — 0.5 tsp — 1 tsp — 1 tsp — 1 tsp — FLUSH
Kelp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp FLUSH
Sweet Finish — — — — — — — 1-2 tsp 1-2 tsp 2 tsp 2 tsp FLUSH
CalMag2* 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1-2 tsp 1-2 tsp 1-2 tsp 1-2 tsp 1-2 tsp 1-2 tsp FLUSH
Humic 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp FLUSH
MicroSynergy 1-2 tsp 1-2 tsp 1-2 tsp 1-2 tsp 1-2 tsp 2-3 tsp 2-3 tsp 2-3 tsp 2-3 tsp 2-3 tsp 2-3 tsp FLUSH
Calcium* 0.5 tsp 0.5 tsp 0.5 tsp 0.5 tsp 0.5 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp 1 tsp FLUSH
Sol. Mycorrhizae 1 tsp — — 1 tsp — — 1 tsp — — — — FLUSH

A dash means Age Old’s own chart lists nothing for that product that week. “FLUSH” in week 12 is the manufacturer’s own instruction — plain water only, no nutrient, for every product on the chart.

* Age Old’s own chart notes: use either CalMag2 or Calcium — they do not recommend using both together.

1 tsp = 5 mL. 1 TBSP = 3 tsp (15 mL). Rates are per gallon of water, RO preferred, fed once a week or every third watering; adjust for your soil media.

Figures as published by Age Old Organics (document advanced-feed-schedule_updated). Feeding charts are recommendations only. Adjustments may be needed based on environmental conditions, your grow structure, and any additional products you run. Actual results vary.

The Age Old line

  • Age Old Grow — the vegetative base
  • Age Old Bloom — the flowering base
  • Kelp, Humic, Fish, Duo, Spread — the supporting range

Reading the schedule

Age Old publishes a 12-week advanced schedule that runs longer than most charts, so match the week numbers to your actual cycle length rather than the calendar.

Organic-based liquids can settle and can be harder on drippers than mineral feed. Shake well, and if you are running drip, filter and flush lines more often than you would with a synthetic program.

Download the original charts

Age Old’s own file, hosted here so the link does not rot:

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