What causes the lettuce from my garden to be bitter?

Question

It's a few different varieties, including Romaine and Boston.
Could it be too much sun? The soil maybe?

Answer 1

Here is a tip.....
Most leafy green vegetables prefer cool weather that includes beans and peas, broccoli , brussel sprouts and cabbage, lettuce (most all of them) spinach.
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University of Illinois Extention
http://www.urbanext.uiuc.edu/veggies/lettuce1.html
Lettuce is a fairly hardy, cool-weather vegetable that thrives when the average daily temperature is between 60 and 70°F. It should be planted in early spring or late summer. At high temperatures, growth is stunted, the leaves may be bitter and the seedstalk forms and elongates rapidly. Some types and varieties of lettuce withstand heat better than others.

Answer 2

You didn't pick it soon enough and it got old and dried out even though it looks green and fresh. Cut off everything growing tall from the center and all the outer leaves that are touching the ground and yellow or brown looking. Give it a week or so to grow again and it should be good to eat again.

Answer 3

The shadows , the sun, the overwhelming knowledge that someday they'll be salad. Sang froid, in general. A melancholy turn of the genetic makep. Lettuce not wonder why between the wet and the dry.

Answer 4

probably too much hot sun and not enough water. lettuce prefers cooler temps. usually does better in the spring and fall

Answer 5

If the soil is rich it is the sun or not enough water

Answer 6

the sun place some canvas over it

Answer 7

You left it too long. Pick off what you have and new will come. If you let it go too long you'll have seed.

Answer 8

You should leave it for now. It will get bigger and reseed its self. Then pick it.