
Ashleigh Smith

Plants aren’t exactly the easiest things to care for. Just like a child can catch a cold or develop a cough for a number of reasons, plants are also susceptible to a number of problems. Some of the most common include nutrient deficiencies that result in various patterns of discolored foliage. Observing the color and location of discoloration will help you know what is lacking. After identifying what nutrient is deficient, consider creating a regular fertilizing schedule. We highly recommend using the organic and water-soluble solutions mentioned below. They not only deliver vital nutrients but encourage good long-term soil health.
Signs of Common Nutrient Deficiency in Plants

Nitrogen (N)
When plants aren’t accessing enough nitrogen, foliage starts to turn pale and eventually yellow. The discoloration may appear uniformly throughout the plant, starting with older leaves. This happens as the plants build less chlorophyll, the pigment that gives foliage its green coloration. Growth is also slowed with smaller than normal fruits developing.

Phosphorus (P)
A lack of phosphorus will result in reduced growth and fruit development. Leaves will turn darker and blue or reddish in color starting with older growth. This occurs with an increase in anthocyanin production. New leaves will appear smaller than normal.

Potassium (K)
This deficiency is not very common in home gardens. However, it can occur. Potassium deficiency is identified by the blotchy yellowing of leaves and a wilted or droopy appearance. Foliage may also appear dark or bluish-green. Because of the role potassium plays in water regulation, plants deficient in this nutrient may experience added water stress.

Iron (Fe)
Low iron available in the soil will result in iron chlorosis. This is identified by faded leaf coloration that sometimes appears as a light yellow on new growth. The whole plant may appear weak. If the problem is not addressed, the leaves will eventually become translucent. Chlorosis may occur due to a lack of iron in the soil or a lack of its availability due to the way nutrients interact with each other and the soil ph.

Magnesium (Mg)
Plants lacking magnesium will have yellowing and pale leaves, similar to a lack of iron. However, the veins will remain a dark green that is distinctly different from the rest of the leaf. The discoloration will start with older leaves but may appear uniform if the transition is slow.
Treat and Prevent Plant Problems
Before Planting
Whether you are growing in a new or old garden, soil conditions can be improved by adding worm castings or compost tea. Adding these will encourage soil microorganism activity that aids plants' ability to access nutrients.
When Transplanting
Whether you are transplanting vegetable starts, flowers, shrubs, or trees, be sure to apply a root stimulator. This will help stimulate microbial activity and encourage stronger root development. When this product is applied at transplanting, the effects of transplant shock are reduced.
Throughout the Season
As plants grow throughout the season, it can be helpful to apply general-purpose plant food. This organically sourced plant food delivers not only necessary macronutrients but also includes amino acids, peptides, and biostimulants that improve nutrient uptake for stronger plants all season long.
About the Author

I'm Ashleigh Smith, a native to Northern Utah. I first gained a love of gardening with my grandmother as I helped her each summer. I decided to make a career of it and have recently graduated with a Bachelor's degree in Horticulture from Brigham Young University - Idaho. My studies have focused on plant production while I also have experience in Nursery & Garden Center Operations.
Our Recommended Picks
Leave a comment
Your email address will not be published. Required fields are marked *
1 comments
Rebecca
The best direct to the point, no nonsense article I have ever read on nutrient deficiencies. The pictures made each issue super clear and the solutions were direct and on point. Keep on writing!
Further Reading
Seed Inoculant Guide: Benefits for Legumes and Soil Health
Written By Lara Wadsworth It is common knowledge these days that healthy soil is critical for healthy plants. While Mother Nature is very good at taking care of her own, yet if you have gardened or farmed for any length of time, you know that sometimes...
Ashleigh Smith
2025-09-164 min read0Improve Your Cardiovascular Health with Microgreens
Written By Lara Wadsworth Heart disease remains the leading cause of death worldwide. This deadly disease is sweeping across America at an alarming rate. However, much of it ties back to lifestyle factors we can control, such as diet and exercise. Few ...
Ashleigh Smith
2025-09-166 min read0September Planting Guide By Zone
Written By Lara Wadsworth September gardening brings cooler air, shifting light, and new opportunities for planting and harvesting. Whether you’re in Zone 3 racing frost or Zone 10 just starting winter crops, here’s what to plant this month. Understand...
Ashleigh Smith
2025-09-0310 min read0Microgreens Grow Lights Guide: Best Options for Beginners & Pros
Written By Lara Wadsworth Microgreens are one of the easiest and most rewarding indoor crops to grow. They are easily grown by anyone in any situation, and they are absolutely packed with nutrition and flavor. You can harvest them in 2 weeks or less, w...
Ashleigh Smith
2025-09-037 min read1