seedlings turning yellow

Why are My Seedlings Turning Yellow?

Seedlings are very young plants that have been raised from seed as opposed to a cutting. This is a crucial part of the growth process for many plants, as they are the first steps toward a healthy and vibrant plant. However, sometimes these seedlings can start turning yellow, confusing, and concerning gardeners. In this article, we will explore the reasons why seedlings turn yellow, what to do if they do, and how to prevent it from happening in the future.

Reasons My Seedlings are Turning Yellow

Below are common reasons that your seedling is turning yellow. Use it as a checklist to ensure that you have set your newly formed crop up for success. When researching hao to properly care for your plant, try to factor in as much detail as you can. The local climate, anomalous weather, elevation, and humidity will help you interpret the rule of thumb and decide what to do.

Lack of Nutrients Can Turn Seedlings into Yellow

Lack of nutrients in the soil can cause seedlings to turn yellow due to malnutrition. When a plant does not receive enough of the essential nutrients it needs for growth and development, it will start to show signs of deficiency such as yellowing of the leaves. This can be prevented by providing seedlings with nutrient-rich soil and regular fertilizer applications. Research your plant and test your soil to see where the problem is.

Is Seedling Getting Too Much/ Too Little Water

Too much or too little water can cause a seedling to yellow due to root rot or dehydration. When a seedling is overwatered, the roots can become waterlogged and start to rot. If a seedling is underwatered, the roots can become dehydrated which leads to poor health. It is important to check the soil regularly and ensure that the seedling is getting the right amount of water for optimal growth.

Make sure that you research and understand what the plant’s water needs are, about your local area and climate. The local humidity and elevation play huge roles when managing your seedling’s watering schedule.

Temperature Stress Can Turn Seedlings Yellow

Temperature stress is a plant’s reaction to temperature ranges that are bad for growth. If the temperature is too extreme or the seedling is left in a temperature outside of its healthy range for too long this can cause the leaves to yellow. When the temperature is too hot or too cold, the seedlings will struggle to photosynthesize. Photosynthesis is crucial for plant growth.

It is important to keep seedlings in a temperature range that is suitable for their growth, as extreme temperatures can cause irreversible damage. If you suspect that this is your issue but aren’t sure there are several low and high-tech solutions to track the temperatures your seedling is being exposed to.

Light Intensity Issues

Seedlings are in a state that demands the optimal amount of sunlight to properly photosynthesize. Too little and it won’t get the nutrients it needs. to yellow due to a lack of photosynthesis. When a seedling does not receive enough sunlight, it will not be able to produce the energy it needs to grow and will start to turn yellow. Seedlings should be placed in a location that receives at least 6 hours of direct sunlight every day.

Pests That Can Turn Seedlings Yellow

Pests can be a menace especially when there are many types of plants in a single garden. Infestations of aphids, mites, and other pests can cause yellowing of the leaves and stunted growth. It is important to monitor seedlings for signs of pests and to take action if any are found. This can include using organic pesticides or hand-picking the pests off the seedlings.

If you find evidence that pests are the issue research carefully what you saw. What pests are known for killing your type of seedling? Is there another plant nearby that attracts them?

Herbicide Damage Can Turn Seedlings Yellow

Herbicides are meant to kill weeds and other undesirables. Seedlings are still adjusting to the world around them and are very susceptible to toxins and chemicals. Even accidental splashing or proximity may be enough to make seedlings start turning yellow. It is important to read the directions on the herbicide label and make sure it is applied at the correct distance from seedlings to prevent any damage.

Jeff Grayson
Garden Hobbyist
Hello! I'm Jeff, an avid gardening enthusiast. I'm based out of Colorado, where I raise as many indoor and outdoor plants as I can!