Spotting yellow leaves on your plant is a sight that most gardeners dread.
Unless your plant has naturally yellow leaves – yellow leaves are usually a very clear sign that your plant is suffering from a lack of nitrogen OR iron.
When a plant has too little nitrogen or iron – you get yellow leaves.
So, how can you tell which nutrient your plant is suffering from?
Nitrogen deficiency shows up in older leaves first. The reason for this is that the plant moves the nitrogen to the younger leaves and the growth of the entire plant begins to slow.
To treat plants with nitrogen deficiency you can use a liquid fertilizer that contains nitrogen, which will provide fast results because it is absorbed quickly. But, you will need to follow it up with a longer-lasting form of nitrogen. You can do this by adding a slow-release fertilizer that contains nitrogen.
For those who choose to use an organic option – use a combination of fish emulsion, compost and blood meal. Spray the fish emulsion diluted with water, (following package directions ) on your plants, which will provide a fast source of nitrogen. Then work compost and blood meal into the soil, which will provide a reliable source of nitrogen as it breaks down.
So, if your plant is suffering from a lack of nitrogen, don’t worry – it is relatively easy to fix and your plant(s) will soon be green and growing strong.
On Friday, we’ll talk about how to ID a plant that is suffering from iron deficiency and how to treat it.
Check out this great article on how to ‘read’ a fertilizer bag.