With the development of the seed stalk
, lettuce leaves become bitter and tough, so the aim is to have a lettuce crop ready to harvest before or after the heat of summer.
When Nantes and Imperator are grown for seed in a hot, dry climate like the research team's central California study site, they need about 22 to 25 inches of water from the time they are planted until seed from the almost-white, umbrella-shaped king umbel - the uppermost flower cluster atop the seed stalk
- and lesser umbels beneath it matures.
A wide variety of sizes will grow onions the next year but as they get larger they are more apt to send up a seed stalk
, and the smallest will have a harder time getting going and making a good sized bulb, plus they don't keep as well.
Unfortunately, it wants to grow a seed stalk
while I still want leaves.
Plant them early in the spring and they will soon start growing a seed stalk
The seed stalk
probably does take some of the energy from the bulb, but the real problem is that it doesn't tighten up as well as the others, so it won't store as long.
Produce a solid stiff false flower stalk, with a coiling seed Stalk
The vigorous plants can reach four to five feet in height with the seed stalk
extending up another two to three feet.
An additional note on head lettuce is that you may need to cut an "X" into the head, allowing for the emergence of the seed stalk
Remove them by plucking the weed before it forms seed stalks
Cut off any seed stalks
unless you are leaving them for the birds or as a design feature for the winter.
Remove seed stalks
as soon as they appear to prevent them from draining the plant.