How To Grow Hydroponic Lettuce

Four General Lettuce Morphology

How To Grow Hydroponic Lettuce

Crisphead

Butterhead

Romaine

Loose-Leaf

Temperature Required

How To Grow Hydroponic Lettuce

Since lettuce is cool-season crop, it is best to keep the air temperature between 8 and 24°C (46 and 75°F)

How To Grow Hydroponic Lettuce

Improper temperatures may result in below symptoms

Bolting

Loss of color

Tipburn

Poor germination

Growing Medium

How To Grow Hydroponic Lettuce

Rockwool is preferred for germination and after germination, the cubes containing the emerging seedlings are set in the NFT trough or hole

If you go with rockwool, be careful to keep it from becoming too saturated. This can lead to root suffocation, stem rot, and root rot

Recommended Dimensions For NFT System

How To Grow Hydroponic Lettuce

In your NFT system, pipe or anything depth should be 1.5 to 3.5 inch and troughs are set on a slope of 1 to 2%

Flow Rate Of Nutrients In NFT

How To Grow Hydroponic Lettuce

0.5 L/min is recommended flow rate. It must be sufficient to keep the roots moist and spacing enough to avoid overlapping of leaves and roots

Measures To Avoid Damage

How To Grow Hydroponic Lettuce

Bottom rot, downy mildew, drop, & mosaic

The common insect pests are leafhopper, leafminer, and looper

You can ignore if you have a sterilized & clean NFT system but you should have knowledge about pest management

Interesting Facts

How To Grow Hydroponic Lettuce

The red color in red-leaf lettuce will increase at lower air temperatures

Lettuce growth is reduced if the temperature is below 10-12°C

Head size is responsive to CO2 level if there is a low flux of radiant energy per unit area

Also Read: Nutrient Required For Hydroponic Lettuce

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