As with a lot of other vegetables, fruit, and herbs; learning how to grow lettuce indoors is incredibly easy.
Information to get started Growing Lettuce Indoors in your home:
Choosing & Planting the Lettuce seeds–
What you need to know about which seeds you should pick for the best crop.
There are many varieties of lettuce available to the gardener, and most of them are incredibly simple to grow.
However, for the indoor gardener, you may find that it is much easier and more appropriate to grow a loose-leaf variety as opposed to a headed variety.
Not only will this allow you to harvest your plants more than once, but you will find that a loose-leaf variety will grow more readily indoors.
Plant the lettuce seeds in planters large enough to ensure that the leaves do not touch each other during growth. Leave around 7 inches for the larger plants and less for the dwarf varieties.
Light & Temperature
How to provide the correct environment for your plants to ensure growth.
Lettuce seedlings require low light which should gradually be increased as the plant grows in size. One way to do this would be to keep the plant in a cool, shaded area whilst young and then move the plant into a sunnier area as it matures.
Lettuce should not be grown under grow lamps if possible, but if necessary then be sure to use only white fluorescent lights as opposed to incandescent lights as this can cause the plant to bolt.
Cool Temperatures are essential at all stages of the lettuce growth period which may prove difficult for those in hotter climates; temperatures of around 12-15 degrees Celsius are perfect. Temperatures over 25 degrees Celsius will stop any growth altogether in seedlings. Hotter temperatures may cause older plants to bolt so move them to a shadier location if necessary.
Tip – Bolting is when the plants grow bigger and faster than is preferred. This usually causes the leaves to become incredibly bitter and inedible.
Watering Containers or Pots
Watering techniques specifically for lettuce.
Feeding & Nutrition
Generally, lettuce is such a fast-growing crop that it should derive all its nutrients from the soil it is planted in provided that the soil is rich enough.
After the first crop has been harvested you will probably find that feeding or two may speed up the growth period for further harvests. Use a fertilizer low in Nitrogen and high in Phosphorous.
- 13 13 13 NPK Fertilizer
- 15 15 15 NPK Fertilizer
How to collect your fruit safely and how to maximize crop growth for the future.
When the plants are in the early stages of growth, thin out the weaker seedlings to encourage the stronger plants to grow lettuce indoors more quicker. These thinnings are edible if you wash them first.
To harvest the lettuce, cut the plant at the soil level, you can leave the roots embedded in the soil, and with enough light, water, and nutrient they should provide another harvest in around 2 months. Some varieties may even provide several crop cycles.
For the best flavor and crispness, you should use all lettuce as soon as possible after picking it.
So there you go! You now know how to grow lettuce indoors whenever you like!