Vitaponix — nextgen nutrients

Visual Guide

Phosphorus Deficiency.

Warm the nutrient solution to 18–21 °C (official chart)

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Dark green or purplish leaves, especially undersides and stemsPhoto

Deficiencies

Older leaves develop dark green to purplish discoloration, especially on the undersides. Growth is stunted, root development is poor, and flowering may be delayed.

Looks like this

  • Dark green or purplish leaves, especially undersides and stems
  • Stunted growth and weak root development
  • Delayed or reduced flowering

Solve it with Vitaponix

VitaBulk

VitaBulk →

Replaces VitaBase from week 7 at 5 ml/L; steers the plant towards heavier flowering.

How to fix it

  • Warm the nutrient solution to 18–21 °C (official chart)
  • Apply a P-K booster during transition and early flower
  • Verify pH is in optimal range

Why it happens

  • Cold root zone temperatures (<15°C) limiting uptake
  • Low pH or alkaline substrate
  • Insufficient P in the feed during transition and flower

Prevent it

  • Keep root temperatures stable and warm
  • Use a flowering booster from the start of transition
  • Maintain pH at 5.8–6.3 (official chart)

Official feeding chart

Target pH (official chart)
5.8 – 6.3
Water temperature
18 – 21 °C

Doses and targets come from the official Vitaponix feeding chart. Vitaponix nutrients are plant nutrition, not pesticides or fungicides.

Prevent it next time

Get the full 10-week feeding schedule.

Open the feeding chartShop Vitaponix →