Almost all crops grown in a Tower Garden should be a rich, deep green color. But what causes your plants to turn yellow? If your green plants are suddenly yellow, work your way through the flow chart below to help you determine what could be causing the problem. Don’t worry, it’s easy to fix!
The pH is important for one reason, nutrient uptake. If the pH is out of range the plants have a hard time taking up the nutrients in the reservoir. All crops have slightly different ideal pH ranges, but if you keep the pH between 5.5 and 6.5, you’ll keep all of the plants happy.
The arugula on the left is showing signs of nutrient deficiency. Either the pH is out of range and the plants cannot take up the nutrients, nutrients are not being added or nutrient lockout is occurring.
Fungus, disease and pest infestations could cause yellowing. These will require a closer inspection of the affected plants to determine the cause.
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