lettuce seedlings

If you’re looking for a way to eat healthier, indoor lettuce is the perfect solution.

Lettuce is packed with nutrients and vitamins that your body needs to maintain healthy cells. It’s also an easy crop to grow indoors, so don’t worry about having space or not enough sunlight.

This how-to guide will show you how to grow lettuce indoors using just four steps!

1. Get the Seeds

Your first step is to get some seeds for your lettuce plant. There are many types of lettuce, so find one that’s already very mature and sturdy. It’ll be able to handle growing in an indoor environment better than a young, undeveloped one.

Search for sturdy lettuce seeds online or at a specialty gardening store. If you already have some seeds, take them out of their packet to see how old they are. Older seeds are more likely to provide excellent results in growing indoors.

2. Get the Container

Now that you have the seeds, it’s time to get the container. The best type of container for lettuce is one that has holes at the bottom for drainage. Placing an onion bag over the hole will also help keep moisture in.

Use a 1-gallon (3.8 liters) pot or any other plastic containers with holes for drainage!

3. Preparing the Soil

When the container is ready, you need to prepare the soil. A good mixture of soil for planting indoors is 1/3 compost, 1/3 vermiculite, and 1/3 perlite.

Mix your customized mixture in with some potting soil to fill up your container until it comes about halfway up the lettuce seeds.

4. Plant the Seeds

Now that the container is filled with your customized mixture, you can plant the seeds!

First, find a spot indoors near a window where you think it will get at least six hours of sunlight each day. Dig a tiny hole for each seed and place them about one inch (2.5 cm) under the surface of the soil. Then, sprinkle a little water on top and cover them with more soil.

You’ve done it! Now you just need to keep watering your lettuce every day and make sure it gets at least six hours of sunlight each day for between two and four weeks (depending on how fast your lettuce grows).

washing lettuce

What are some of the best ways to grow lettuce?

The roots need potting soil with good drainage and it should be watered regularly. You can also use containers like pots or terracotta plant saucers as long as they have holes in them for adequate drainage.

Be sure that your container has at least one inch of gravel on the bottom (or any other material that will allow water flow). Fill up your pot with soil, make sure there is enough space to plant the seed, and place them about 2 inches deep.

How do you plant lettuce indoors?

First of all, plant the seedlings in soil that feels smooth and even. Plant them with proper spacing between each plant to ensure they get enough light.

For better results, place your pot near a sunny window where it can receive plenty of light. Plant your seedlings about 2 inches deep in the soil and plant them with proper spacing between each one.

The seedlings can be planted inside a grow pot or plant tray, for this it is better to use a good soil mix that has nutrients required for plant growth.

Use an indoor pot or any other container that has well-draining holes at the bottom.

It is better to use a tray with a drainage hole or a plant pot with holes at the bottom of it.

Fill up your plant pot or indoor plant tray with well-draining soil, make sure there is enough space.

Watering Indoor Lettuce

A lot of people don’t realize this, but lettuce is actually one of the easiest plants to grow indoors. It requires little care and minimal fertilization, which cuts down dramatically on your shopping bills!

There are a few things you should know when growing lettuce in an indoor environment though.

Indoor soil can be very compacted from years of fertilization and may not hold water well. This is bad news for your lettuce because it results in rapid wilting, especially when you’re fertilizing with tap water.

How do you get around this? Use distilled water.

I know tap water is very cheap, but distilled water will save your plants from dying a slow painful death from dehydration.

Potting and Containers

As for containers, you can simply use indoor pots or clay feeding bowls.

Soil Mix

It is best to make soil mixes suitable for certain plants. You can find premium soil mixes at gardening shops (specialty soil mixes designed for each plant).

Some plants such as tomatoes need soil that is rich in nutrients. Others like lettuce, don’t really need soil mix composed of special ingredients. I believe this soil mix works well with lettuce and other leafy vegetables.

As for containers, you can use pots or clay feeding bowls. Clay feeding bowls are good for soil mixes because the soil doesn’t stick on to them.

Partial Shade

Lettuce likes partial shade. The amount of light it receives should be controlled so that it doesn’t get too much sun, making the leaves yellow and dry. However, you also need to make sure that lettuce gets enough light to produce leaves.

When growing lettuce indoors, it is best to keep the soil moist so that the soil temperature can be kept high. Therefore, I have placed lettuce under a fluorescent light since it provides much more heat than regular lights (which are cold).


Lettuce seeds are tiny so they need soil that is not too compact. I have placed soil on top of a layer of gravel because the soil will be kept moist if it is placed over stones.

The soil surface should not be completely flat since the seed needs space to grow roots. Instead, use a soil mix with fine grains to allow the soil to be easily distributed.

When germinating soil, it is also important not to let the soil dry out. I have placed soil under a fluorescent light since it provides much more heat than regular lights (which are cold). The soil temperature should be above 60 degrees F for germination to take place.

I added water every morning and evening for the soil to stay moist. I also checked soil moisture every day by gently touching it with my fingers. Do not let the soil dry out to the point where it becomes completely dry because the seed will then die.

After germination, I placed the lettuce under a regular lamp (not a fluorescent light). If the soil gets dried out, place soil under a fluorescent light because soil moisture will be maintained without it becoming too hot.

I believe soil temperature should not fall below 60 degrees F for proper germination to take place.

woman holding lettuce

Pruning Indoor Lettuce

Pruning lettuce plants will make them grow better. Lettuce plants are usually grown to full size before they are harvested, but you can prune them for baby leaves instead of harvesting whole plants.

Pruning makes the plant produce more new growth, which results in baby lettuces that are ready within a few weeks of planting.

Lettuce is a cold-weather crop that grows best when the overnight low temperatures are between 55-60 F (12-16 C). The growing season for homegrown lettuce is long and you can grow it year-round, but you will need to start seeds indoors or transplant seedlings into a cold frame in the fall to have homegrown lettuce in winter.

Harvesting Lettuce

Harvesting lettuce is not difficult, but it does require a little bit of attention.

Lettuce is best harvested when the heads are soft and at their most tender stage. This usually occurs in about 45 to 50 days after planting, or harvest can begin once there are four to six leaves on the lettuce plant.

A good rule of thumb for harvesting an individual head of lettuce is to harvest from the outside of the plant first, rather than from the center. This will allow the remaining lettuce plant to mature and grow larger for a longer harvest period.

Lettuce can be harvested using several methods. A common method involves simply cutting off the entire head of lettuce at its base with a knife or scissors.

If you harvest this way, be sure to do so before it develops a bitter taste. Harvest the lettuce before the central stem begins to elongate.

Be sure to harvest lettuce in cool weather, as excessive heat can cause lettuce to wilt and become seedy.

Lettuce heads may also be harvested by simply bending them until they break off at their base. This is a very popular method because it allows each lettuce head to grow larger and remain in the garden longer than if it were harvested by cutting off at its base.

This can be achieved by removing the outer leaves as they mature and then removing the remaining core, which will force the plant to produce more leaves for harvesting later.


In the end, growing lettuce indoors is a great way to provide food from your own home. You will need to be patient and have some basic gardening knowledge, but you can grow anything indoors if given enough time and care!