Watch out for iron deficiency in pansies

Added on 20 October 2023

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Watch out for iron deficiency in pansies

In greenhouse production, interveinal chlorosis of the upper foliage is commonly associated with iron deficiency. Iron deficiency is initially commonly observed as a light-green coloration of the new upper foliage, progressing to more pronounced interveinal chlorosis, and finally, in severe cases, total yellowing and bleaching of the foliage. However, there is a wide range of causes for iron deficiency including insufficient iron fertility, high substrate pH, or overwatering. If only a few scattered plants are infected, then inspect the roots for root rot.

While these can be common problems in greenhouse production, determining why iron deficiency is occurring is critical for attractive plants.

Pansies can be classified as high pH sensitive crops. A recent e-GRO alert highlights why in most cases, plants with abnormally high pH values will experience iron deficiency symptoms first. Iron is an immobile element in the plant and as a result, cannot be translocated from lower foliage to meet the plants’ needs in the newly developing portions of the plant.