There are various methods of propagating vegetable seedlings. 
One common method used in our local farms is to sow seeds in module cell trays, and the seedlings are then transplanted to the land when they are about 2 to 3 weeks old (depending on type of crops).

A healthy seedling removed from the module trays will have a good root system, with near white roots.

Vegetable Seedling

 

For lettuce, maturity of the crop usually take 45 to 60 days (depend on crop and climate conditions).
Therefore, we will usually grow the seedling a little longer in the tray when compared to other local leafy greens (e.g. pak choi)

For a beginner gardener, they may want to start off with direct seedling, to mimimise the risk of transplant shock when they move their seedlings.

For a intermediate and advanced gardener/farmer, it is a good practise to grow seedlings and transplant them to your land as it will allow you to have successive planting and maximise your crop yield based on your given spaces.

 

 

Starting a new batch of vegetable crops from seed requires good skills and monitoring.

From commercial point of view, we select very high quality seeds. 

Secondly, we need to ensure the seeds are optimal for germination based on temperature and other parameters, including light (.e.g sunlight).

Here is an example how healthy our vegetable seedlings are when we grew them well!

You can learn how to germinate seeds for hydroponics systems in our Basic Hydroponics Course

Hydroponics Seedling Lettuce1

 

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It was noted in the news that high levels of pesticides are found in some lettuce imported from overseas into Singapore 

See Straits Time Article

On one hand, we are glad that local authorities do regular sampling checks on imported vegetables,
on the other hand, we need to be more conscious on the reality of commercial farming by non-organic farmers.

Therefore, it is important that we learn how to grow our own vegetables and avoid the use of pesticides where possible.

 

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