Over-watering can lead to which common problem?

• A. Increased growth
• B. Nutrient deficiency
• C. Drought stress
• D. Root rot

Answer: (D)

Over-watering creates waterlogged soil, leaving little air for roots. Plant roots must respire to take up water and nutrients; when oxygen is scarce, they weaken and die. That dead or damaged root system invites pathogens like fungi and oomycetes, leading to root rot. The plant then shows wilting and yellowing even though the soil is wet, with stunted growth and eventual decline. This is the most common and direct consequence of too much water. Increased growth isn’t expected, drought stress is the opposite condition (too little water), and while nutrient leaching can happen with excess water, it’s not the primary problem in this scenario.