What is the Best Fertilizer for Lettuce?

Written by Amir Tajer


Posted on August 27 2021

Lettuce and other greens need lots of plant food to have healthy leaves, which is why finding the best fertilizer should be a priority.

While there are many fertilizers in the market, not all of them are high quality, especially for hydroponics lettuce.

So, what is the best fertilizer for lettuce and leafy greens?

Here, we will discuss what the best fertilizer for lettuce consists of, but first, let's look at what nutrients lettuce requires and the qualities a good fertilizer should have for the healthy lettuce growth.

Nutrients Ideal for Lettuce and Why

Leafy green lettuce in garden

Most plants need up to 17 different nutrients during their life cycles. These nutrients are not required at the same time or in the same amounts.

However, out of the 17, the three primary nutrients ideal for all plants, including lettuce, are nitrogen, phosphorous, and potassium - also referred to as NPK.

The same goes for a hydroponic lettuce crop, though they typically get their minerals in the form of a hydroponics nutrient solution.

Since lettuce is a fast-growing plant, it requires frequent feeding.

So why does lettuce require the three primary nutrients?

Nitrogen is the critical component for chlorophyll which absorbs sunlight and produces sugar used by plants. In other words, nitrogen is a must for green leaves.

Phosphorous is required for new growth, root development, and lettuce maturity. And for the overall plant health of organic or hydroponic lettuce, potassium is needed.

However, there should be a balance of these nutrients for healthy leafy vegetables.

Besides those nutrients, lettuce also needs little magnesium, calcium, iron, zinc, boron, and manganese.

Qualities of a Good Fertilizer for Lettuce Growth

Lettuce and Leafy Greens 8-15-36 Fertilizer Water Soluble

Leafy vegetables require adequate levels of nitrogen (N), phosphorous (P), and potassium (K) for a high-quality harvest.

A good fertilizer ideal for lettuce should have the right balance of these nutrients.

The essential quality of fertilizer is the ability to spread quickly with even distribution.

Also, a good quality fertilizer should be easily applied and promptly dissolve when in contact with water or moist soil.

Considering the well-being of the environment, a good fertilizer should also be free from additives and contaminants.

What to Expect After Using Lettuce Fertilizer

Hydroponic lettuce system

The yield and growth of lettuce is largely influenced by the type of fertilizer used.

After using proper lettuce fertilizer, expect a high yield of better quality lettuce compared to a non-fertilized crop.

On it's own, lettuce typically grows quickly, but after using proper fertilizer, the growth will be more rapid.

Additionally, since lettuce fertilizers help resolve major nutrient deficiency problems, there will be no wilting plants in your garden beds.

In other words, you'll have lettuce plants that grow strong all season long, which translates to fresh and healthy lettuce for any meal!

The Best Fertilizer for Lettuce

Our Lettuce Fertilizer 8-15-36 Plus Micro Nutrients is the best option for lettuce growth. The fertilizer is blended to offer a balanced ratio of nitrogen, potassium, and phosphorous as well as key micronutrients like boron, copper, iron, manganese and more.

Because it's water soluble, our lettuce fertilizer is also ideal for hydroponic lettuce growth.

When you apply our hydroponic lettuce fertilizer, you can expect an increased and high-quality lettuce yield.

Micro-greens, kale, broccoli, spinach and other green veggies will love this fertilizer as well. You can view the entire list here.

This fertilizer is also free from contaminants and heavy metals, making it safe for the environment and your garden.

Whichever type of lettuce you are growing, our lettuce fertilizer has all essential minerals, including chelated micronutrients for your leafy vegetables. For healthy lettuce growth, shop Lettuce Fertilizer 8-15-36 Plus Micronutrients and our other specialty fertilizers today!


Related Posts:

  • What is the Best Fertilizer for Strawberries? 
  • What is the Best Fertilizer for Cucumbers? 
  • What is the Best Fertilizer for Herbs?



  • Comment author

    Chlorophyll levels can often be increased by making sure that plants have adequate levels of magnesium, iron, and nitrogen. The use of correct nutrient ratios utilizes the plants’ potential when growing. Different plants remove different vital nutrients from the soil and many plants need 17 nutrients for maximized growth. Not responding to the nutrient needs of certain plants causes an economic pitfall for a producer and also produces environmental concerns. Tissue sampling allows for proper nutrients to be applied according to the plants’ needs. Any of these three nutrients can be used to quickly give plants a dark green color by increasing chlorophyll. Since nitrogen is generally abundant, magnesium and iron usually produce the biggest economic crop response. When leaf temperatures are too high, photorespiration becomes dominant instead of photosynthesis, plant energy levels begin dropping, ammonium is produced in leaf tissue as a result of protein catabolism, and plant immunity is quickly reduced. There is not a direct correlation between leaf temperature and air temperature. Healthier plants remain cooler for much longer at higher leaf temperatures, through a variety of mechanisms. Manganese for example is needed for water hydrolysis. When the H20 molecules are split into H and OH ions, hydrogen, and hydroxyl then the water can be utilized for photosynthesis. A lacking of manganese for example limits the photosynthesis potential in the plant.

    Posted by The Needs of Particular Nutrients for Plant Growth | February 21, 2023
  • Comment author

    I doubt buying a fertilizer specifically for lettuce is necessary. Get a comfrey plant, preferably a non-invasive species. In a season, that comfrey plant will put out many large leaves, which can be gathered and place in a 5 gallon bucket. Pack the leaves in, tearing them up a bit as you go. Then add water to the brim of the bucket and let that sit for at least 2 weeks. I call it stinky water, as it is. If you apply a pint of that mixed in a bucket of water to your lettuce bed every 10 days or so during the lettuce growing season, your lettuce will produce wonderful healthy lettuce for a surprisingly long time. Try it—totally organic, free, and it works for most plants!

    Posted by Gale Harris | August 31, 2021
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