Concur. It will bolt when the plant is mature enough to produce. Bok Choy/Pak Choi is not noted for early bolting. Even the earliest varieties should not flower until 40 or more days have passed. Many of new varieties are quite small ( baby size) and will bolt at a small size, but still need time.

Book Choi does better when days are shortening. Lengthening days promote flowering.

True it holds indefinitely in the fall and is triggered to bloom with increasing daylight. Most varieties will grow to maturity in the spring. While variety is important, I have had no problems getting mature plants planting in late winter-early spring.

I still don't know when to plant. Early spring, late winter, summer or fall. Early spring did not work for me, but I did have plants coming up in the late summer.

Where are you . Bok choy cannot handle a hard freeze. so you need to plant it early enough to make mature size before hard freezes arrive. For most varieties 7-9 weeks from emergence. Here in Georgia My target planting dates are April 1 and September 1

Dimo048, I don't know if you are giving enough info. Are you starting seeds outside? Or starting seeds in pots? Buying transplants? Also, an older stunted plant that hasn't been growing normally may just bolt at a smaller size. Transplants can be easy in the Spring. Growing seedling in late summer can have problems, but once the weather mellows they will grow until hard freezes.

Bok Choy likes mild weather, which would be like April, May and September, October. You want to avoid mid June to mid August, way too hot.

I started baby bok choy from seeds outside in small pots after the last frost here in LI NY, probably early April. They all sprouted and bolted right after they came out of the ground. I was told they like it cool. thanks.

They do like it cool. If it was still consistently cool up there when they bolted as young plants that's usually something else. Watering, sunlight, pests, etc. I grow mine through winter frosts to get cool enough weather here, so to be clear they don't like anything too long around 80f.

If it starts hitting 79-85 too often mine bolt. Even when that decides to happen in February. Once they get on the flowering path, cooler days following warm days don't change their minds. Choy hasn't been as sensitive to frosts vs something like lettuce, plus I don't play that trying to find spring game ("after last frost"). I grow choy out in the open. Frost rarely damages more than an outer leaf side, and only after it's been 70-75f too often just before the dip.

I think I will sow them directly into the garden this time, same time of year early spring. thanks.

Just remember Bok choy is a fast grower . (40-45 days) Those varieties listed as "Baby" are quite fast, but are very small at maturity. When they reach maturity they will bolt. You can't wait for them to get a larger.

You might try rigging up a small plastic tent and plant early under the tent. Some varieties are better suited than others for spring planting.