Fertilize your seedlings to give them a strong and healthy start to life!
Starting plants from seed can be difficult, especially for new gardeners. But once the seedlings have germinated, it can be even harder to keep them healthy and strong. To help the seedlings develop into robust plants, fertilizing them is essential.
It’s crucial to know how and when to fertilize seedlings properly to prevent any damage. In this post, we’ll discuss why it’s important to fertilize seedlings, when to fertilize them, and the right amount of fertilizer to use.
Why is it important to fertilize seedlings?
Without proper fertilization, seedlings will start showing signs of nutrient deficiencies such as pale leaves and stunted growth. It will also lead to smaller and weaker plants which will eventually mean smaller harvests. To prevent all these problems and grow healthy seedlings with strong root systems, fertilizing is key.
By fertilizing seedlings, you’re giving them a boost of essential nutrients like nitrogen (N), phosphorous (P), and potassium (K) which will all help them thrive.
When should you start fertilizing seedlings?
Did you know that a seed has enough food to germinate and grow its first set of leaves? These leaves are called cotyledons. They are not the actual leaves of the plant and can be identified easily as the leaves that grow after them will look completely different. The following leaves are called ‘true’ leaves.
The general rule of thumb is to wait until your seedlings have developed their first set of true leaves and are about 2 inches tall before introducing fertilizer. This usually happens about two-three weeks after germination. Fertilizing too early can actually harm your seedlings, as their roots are still delicate and may not be able to handle the extra nutrients.
How to fertilize seedlings?
When it comes to choosing the right fertilizer for your seedlings, opt for a balanced, water-soluble fertilizer. Look for a fertilizer specifically formulated for seedlings or young plants, these contain a higher ratio of phosphorous which promotes a stronger root system. Fish emulsion fertilizers are also a great choice.
If you use a regular water-soluble fertilizer, follow the instructions on the packaging but be sure to dilute the fertilizer to quarter or half the recommended strength. This is because seedlings are still very delicate, and a strong dose of fertilizer will burn their roots and cause the plant to die.
It is best to bottom-water seedlings to avoid problems like fungus gnats and fungal diseases. It also allows the seedling to take up the appropriate amount of water, distributes water evenly, and prevents over-watering.
Fertilize your seedlings once every two weeks. As the seedlings grow bigger, you can gradually increase the strength of the fertilizer. Seedlings need plenty of water, so don’t forget to water adequately between fertilizing. It will make sure that the plant can take up the nutrients from the fertilizer.
FAQ
What are the best nutrients for seedlings?
Nitrogen (N), phosphorous (P), and potassium (K) are some of the most important nutrients. These can be found in balanced fertilizers. Fertilizers specifically made for seedlings have a higher phosphorous ratio since it helps in the growth of strong roots.
What is the best thing to grow seedlings in?
If we’re talking about growing mediums, then a sterile seed starting mix is best as it will avoid fungus gnat problems, but a regular all-purpose potting soil will do just fine. For containers, seedlings can be started in almost anything as long as there is drainage, for example, seedling trays, egg and milk cartons, yogurt cups, and even toilet paper rolls can be used!
How often should I water seedlings?
Water your seedlings every 1-2 days to prevent the soil from drying out. Don’t overwater them as this will cause root rot and fungus gnats. If you are growing your seedlings under grow lights, you might need to water more often to keep the soil moist.
Does seed-starting mix need fertilizer?
Adding fertilizer to seed-starting mixes can potentially harm the roots of your seedlings, causing them to burn. As seeds already contain sufficient nutrients for germination, it is best to feed your seedlings with liquid fertilizer only after the first true leaves have emerged.
