Greenhouse with tropical plants
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Ten common greenhouse mistakes and how to avoid them
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- 1. Overwatering
It's easy to overwater in a controlled environment. Many greenhouse plants need less water than you think. Overwatering can lead to root rot, yellowing leaves, and fungal issues. Monitor soil moisture regularly and adjust watering based on the plant type, season, and current weather conditions.
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- 2. Not enough light
Don’t block too much light - plants need full-spectrum light to thrive. Most greenhouse plants require as much light as possible to ensure healthy, vigorous growth. Lack of light causes leggy, weak plants and increases the risk of disease, pests, and fungal problems.
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- 3. Too much of sun and heat
Greenhouses with plastic covers can trap intense heat, and during sunny afternoons, plants may get “cooked”. Direct sunlight can quickly overheat and damage foliage. Use shade cloth during the hottest months or to protect light-sensitive plants and prevent heat stress.
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- 4. Overcrowding plants
Packing in too many plants reduces airflow, creating ideal conditions for disease and pest outbreaks. Give each plant enough space to breathe, grow, and receive light. Proper spacing also makes pest control and maintenance easier.
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- 5. Poor ventilation
Lack of airflow leads to overheating, humidity buildup, fungal disease, and weak growth. Use fans, roof vents, or roll-up sides to improve circulation and maintain healthy growing conditions.
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- 6. Skipping pest inspections
Greenhouses can trap pests in an ideal environment. Check plants regularly for aphids, spider mites, whiteflies, and fungus. Use systemic insecticides or organic treatments like neem oil at the first sign of trouble.
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- 7. No consistent schedule
Inconsistent watering, feeding, and lighting can stress your plants and reduce productivity. Set a simple routine, and monitor conditions daily - even a quick walkthrough helps catch problems early.
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- 8. Neglecting temperature and humidity control
Temperature and humidity can fluctuate dramatically between day and night. Use a thermometer (preferably with max/min memory) and a hygrometer to track conditions. Install heaters, shade cloth, misting systems, or dehumidifiers as needed.
Modern WiFi-based sensors that monitor temperature and humidity 24/7 are convenient tools - you can keep tabs on your greenhouse right from your smartphone.
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- 9. Recycling old soil
Avoid reusing soil from plants that died, as it may harbor root diseases or pests. Always use fresh, high-quality soil for new plantings. Don't cut corners - healthy soil is key to healthy plants.
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- 10. Dirty tools, containers, and covers
Reusing dirty pots or tools spreads disease. Clean and disinfect containers, trays, and tools regularly. Use a diluted bleach solution to clean clear plastic or ground covers if they show mold or algae buildup.
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