🥒 Courgette Growing Problems Explained

Courgettes are fast-growing and productive, but they can quickly run into problems if conditions aren’t right. From flowers falling off to plants suddenly collapsing, courgettes are very good at showing stress.

This guide explains the most common courgette growing problems, what causes them, and how to fix them, whether you’re growing courgettes in the ground, raised beds, or containers.

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🌱 Why Do Courgette Plants Struggle?

Most courgette problems are caused by:

• Inconsistent watering
• Poor pollination
• Nutrient imbalance
• Temperature stress
• Pests and disease

Because courgettes grow so quickly, small issues show up fast.

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🌼 Flowers Falling Off Without Forming Courgettes

🔍 What’s Happening?

Flowers appear but drop without producing fruit.

❌ Causes

• Poor pollination
• Cool or wet weather
• Early in the season (male flowers first)

✅ Fix

• Encourage pollinators
• Hand-pollinate if needed
• Be patient — female flowers follow male ones

This is one of the most common courgette concerns.

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🥒 Small Courgettes Rotting at the Tip

🔍 What’s Happening?

Tiny fruits start to grow, then rot and fall off.

❌ Causes

• Poor pollination
• Inconsistent watering
• Stress from temperature swings

✅ Fix

• Water regularly and evenly
• Improve pollination
• Mulch to retain moisture

This problem is rarely a disease.

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🍃 Yellowing Courgette Leaves

🔍 What’s Happening?

Leaves turn pale or yellow, often starting lower down.

❌ Causes

• Nitrogen deficiency
• Overwatering
• Natural ageing of older leaves

✅ Fix

• Feed regularly with a balanced fertiliser
• Improve drainage
• Remove old yellowing leaves

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🌿 Lots of Leaves but No Courgettes

🔍 What’s Happening?

Plants grow large with plenty of foliage but little fruit.

❌ Causes

• Too much nitrogen
• Poor pollination

✅ Fix

• Switch to a potassium-rich feed once flowering
• Avoid overfeeding early
• Improve pollination

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🍂 Powdery Mildew on Courgettes

🔍 What’s Happening?

White, powdery patches appear on leaves.

❌ Causes

• Poor airflow
• Dry roots with humid air
• Late-season stress

✅ Fix

• Water at soil level
• Improve airflow
• Remove badly affected leaves

Mildew often appears late and doesn’t always ruin crops.

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🐛 Pests Affecting Courgettes

Common Problems

• Aphids
• Slugs and snails
• Spider mites

Signs of Trouble

• Chewed leaves
• Sticky residue
• Distorted growth

Fix

• Check plants regularly
• Remove pests early
• Keep plants healthy and well-watered

Strong plants cope better with pests.

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💧 Overwatering vs Underwatering Courgettes

Overwatering Signs

• Yellow leaves
• Soft stems
• Poor root health

Underwatering Signs

• Wilting leaves
• Bitter or misshapen fruit
• Poor yields

Best Practice

• Water deeply and consistently
• Focus on the root zone
• Mulch to maintain moisture

Consistency is more important than quantity.

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🌱 Sudden Plant Collapse

🔍 What’s Happening?

Plants wilt and die suddenly, often mid-season.

❌ Causes

• Vine weevil (in containers)
• Stem rot
• Severe water stress

✅ Fix

• Check roots and stems
• Improve drainage
• Avoid waterlogging

Collapsed plants rarely recover.

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❌ Common Courgette Growing Mistakes

🚫 Inconsistent watering
🚫 Overfeeding with nitrogen
🚫 Poor spacing
🚫 Ignoring pollination
🚫 Letting plants dry out

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🌟 Final Thoughts

Most courgette growing problems come down to water consistency, feeding balance, and pollination. Get those right, and courgettes are one of the most generous crops you can grow.

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