Non-Chemical Management
- Select cultivars that have low susceptibility to blossom-end rot such as Celebrity, Jet Star, and Mountain Pride, and avoid cultivars with high susceptibility like Big Boy, and Wonder Boy.
- Trellising and pruning can increase blossom end rot by increasing plant stress.
- Plant in well-drained soils and water consistently.
- Provide proper culture. Fertilize moderately to avoid buildup of salts in the soil and to prevent excessive growth which may decrease calcium availability to fruits. Mulching plants may be helpful.
- Soil testing may be necessary to determine calcium levels. Your county extension agent or WSU Master Gardeners can recommend soil testing laboratories in your area.
- Calcium-deficient soils can be corrected with use of lime or dolomitic lime in the fall or 2-4 months before planting.
Select non-chemical management options as your first choice!