Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Coleus > Stunted plant
Coleus > Whole plant > Stunted plant
1 of 3
Root Rot
Rhizoctonia solani and Pythium spp.
- Leaves yellow and wilt
- Plants are stunted
- The base of the stem may turn brown and crack
- Roots have brown sunken areas and lack root hairs
- Disease common in wet, poorly drained soil
- Lab analysis needed to determine which pathogen is causing the rot
- More information about Rhizoctonia root rot
- More information about Pythium root rot
2 of 3
Impatiens Necrotic Spot Virus (INSV)
- Symptoms are extremely variable
- Stunted growth and wilting may occur
- Leaf distortion; ringspots or black spots on leaves and stems; blackish/purplish coloration along leaf veins
- Tip dieback and in some cases entire plant will collapse
- Lab test needed to identify INSV since it is difficult to diagnose on symptoms alone
- More information on INSV
3 of 3
Downy mildew
Plasmopara lamii
- Large brown angular blotches may appear on leaves
- Leaves may curl slightly downward, downy white to fungal growth on underside of leaves
- Plants become yellow in color and stunted
- Infected leaves prematurely drop from the plant leaving a barren stalk with few leaves
- Cool, wet weather favors disease
- More information on Downy mildew
