Why Is My Capsicum Plant Not Growing?

If your capsicum plant is not growing, it usually comes down to climate, soil conditions, or fertiliser problems. Capsicum is sensitive to stress, and even small issues can slow growth or stop fruiting.

Cold temperatures: Capsicum needs warmth. Growth slows below 18°C and stops in frost.
Poor sunlight: Less than 6 hours of sun per day will limit growth.
Compacted or poor soil: Roots struggle in heavy, waterlogged soil.
Over or under watering: Both extremes stress the plant and slow development.

If conditions are right but growth is still weak, the problem is often nutrient imbalance. Capsicum requires consistent feeding with the correct fertiliser balance to thrive.

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Nutrient Issues That Stop Capsicum Growth

Excess nitrogen: Produces lots of leaves but very little flowering or fruit.
Low phosphorus: Weak root growth and slow plant development.
Lack of potassium: Flowers drop and fruits fail to form properly.
Calcium deficiency: Leads to blossom-end rot and stunted fruit.
Magnesium deficiency: Yellowing between leaf veins on older leaves.
Iron deficiency: Pale new growth and weak plants.

These fertiliser issues are common when feeding is irregular or unbalanced. Capsicum responds quickly to the right nutrients, so correcting deficiencies usually restores growth.

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Capsicum Growth Problems FAQ

Why is my capsicum plant small? Usually due to cold weather, low sunlight, or nutrient deficiencies.
Why are there no flowers? Too much nitrogen delays flowering. Increase potassium and phosphorus.
Why are flowers falling off? Stress from heat, lack of water, or low potassium levels.
Why are fruits not forming? Poor pollination or lack of potassium and calcium.
How do I fix slow growth? Ensure warm temperatures, full sun, and feed regularly with a balanced NPK fertiliser.

CompleteGrow Recommendation: Revive struggling capsicum plants with CompleteGrow All Purpose Plant Liquid Fertiliser NPK 20-20-20 & Micro Nutrients. This formula corrects deficiencies, balances growth, and helps plants transition from leaves to flowers and fruit.