Deficiencies

Potassium deficiency

Identify Potassium deficiency: symptoms, possible causes, prevention, and practical actions for 53 affected plants. Stunted growth

Affected plants Deficiencies

Editorial diagnosis

Diagnosis overview

Potassium deficiency is a deficiency pattern in which nutrient supply or uptake does not match the plant's needs.

In gardens, Potassium deficiency can occur on plants including Physalis pruinosa, Apple, Apricot, Cynara scolymus. In the available profiles, it is linked mainly with Alliums, Asian greens, Berries.

The recorded risk level is medium.

Check whether young or older leaves react first, whether veins remain green, and whether the pattern is evenly distributed. Assess soil moisture, pH, and root condition at the same time. Record the most recent feeding and use a soil test for recurring or widespread deficiency patterns instead of applying several fertilisers on suspicion.

A common mistake is to fertilise immediately. Waterlogging, drought, cold soil, unsuitable pH, or damaged roots can block nutrient uptake.

At a glance

Plants

Risk

medium

Typical signs

Stunted growth
Marginal necrosis on older leaves
Marginal leaf yellowing (chlorosis) spreading to the leaf edge
Wilting symptoms despite moist soil
Leaf margin burn
Poor fruit development
Weak stems
starting on older leaves

Immediate actions

Potassium fertilizers (e.g., potassium sulfate)
compost
Application of wood ash (in moderation)
Anwendung von Gesteinsmehl oder Eierschalenpulver
Amend soil with organic matter
Ensure adequate potassium supply through organic fertilizers (e.g., wood ash, well-rotted manure) or specific potassium fertilizers
comfrey tea
Use wood ash sparingly