As an experienced gardener and landscaping expert, I can confidently say that adding fertilizer to your seed starting mix can be beneficial for the growth and development of your seedlings. While it is true that seedlings initially derive nutrients from the soil in which they are planted, it is important to provide them with additional nourishment as they continue to grow.
When it comes to fertilizing seedlings, timing is key. Once your seedlings have reached a height of three inches, it is generally a good time to start fertilizing them. At this stage, they have developed a strong root system and can better absorb the nutrients from the fertilizer.
There are three key nutrients that all plants require for healthy growth: nitrogen (N), phosphorus (P), and potassium (K). These nutrients are commonly represented by three numbers on fertilizer bags, such as 2-2-3. The first number represents the percentage of nitrogen, the second number represents the percentage of phosphorus, and the third number represents the percentage of potassium.
Nitrogen is essential for promoting leafy growth and overall plant vigor. Phosphorus is important for root development, flowering, and fruit production. Potassium helps with overall plant health, disease resistance, and stress tolerance. Therefore, it is important to choose a fertilizer that provides a balanced ratio of these nutrients.
When selecting a fertilizer for your seedlings, you may opt for a slow-release granular fertilizer or a water-soluble fertilizer. Slow-release fertilizers are applied once and release nutrients gradually over a longer period of time. Water-soluble fertilizers, on the other hand, are mixed with water and applied more frequently, usually on a weekly basis.
Personally, I have found success using a balanced, water-soluble fertilizer for my seedlings. I mix the fertilizer according to the instructions on the package and apply it to my seedlings once a week. This helps ensure that they receive a steady supply of nutrients to support their growth.
It is important to note that while fertilizing can be beneficial, it is also possible to over-fertilize your seedlings, which can lead to nutrient burn or stunted growth. It is always best to follow the instructions on the fertilizer package and to monitor your seedlings’ response to the fertilization. If you notice any signs of nutrient burn, such as yellowing or wilting leaves, it may be necessary to reduce the frequency or strength of the fertilizer.
Adding fertilizer to your seed starting mix can provide your seedlings with the necessary nutrients for healthy growth. By fertilizing after they reach three inches in height and continuing to fertilize on a weekly basis, you can support their development until they are ready for transplanting. Just remember to choose a fertilizer with a balanced ratio of nitrogen, phosphorus, and potassium, and to monitor your seedlings’ response to the fertilization to avoid overdoing it.
