My husband harvests the rhubarb all at the same time.
While you can harvest rhubarb after individual stalks reach a certain height, you should stop cutting by late July, to allow the plant to gather strength for the following year. This article should help you a bit: https://www.gardeningknowhow.com/edible/vegetables/rhubarb/harvesting-rhubarb.htm
When is the latest time I can pull rhubarb from my garden?
Late July would probably be the last date. This article has more information: https://www.gardeningknowhow.com/edible/vegetables/rhubarb/harvesting-rhubarb.htm
What do I wrap it in? Do I remove all the stakes before storage? I shall replant it in the SPRING in a new location. Thank you.
I take it you're in a spot where there are little or no freezing temperatures in the winter. You can dig the rhubarb, wrap it in damp unmilled sphagnum, and put it in a pot covered with soil, then freeze it for 6 weeks. Here are a couple of articles with more information: https://www.gardeningknowhow.com/edible/vegetables/rhubarb/protecting-rhubarb-in-winter.htm
https://www.gardeningknowhow.com/edible/vegetables/rhubarb/protecting-rhubarb-in-winter.htm
I planted a rhubarb plant this spring and now that winter is coming on I want to know how to winterize it. I did not harvest any stalks this summer, and now it has a few stalks and leaves left. Should I cut the stalks down before covering with mulch, or should I just leave them? I live in Fairbanks, AK, so we experience a pretty hard winter. Any help you can provide will be appreciated.
You can trim the plants back or leave them alone until after winter. They should not need any special attention through winter; however, the first winter for any plant is the hardest. Covering the ground where they are with mulch this year will help make the winter easier for them, but after this year, mulching will not help or hurt the plants. Here is more information: https://www.gardeningknowhow.com/edible/vegetables/rhubarb/protecting-rhubarb-in-winter.htm
I live in southwest Kansas. When should I start watering my rhubarb? It is just showing red bulbs.
Rhubarb really requires little care! But it is not drought tolerant. If your area is dry, I would began watering when you start seeing it emerge from the soil. Do not over water, this could cause the crown to rot.
Here is a link about Rhubarb.
https://www.gardeningknowhow.com/edible/vegetables/rhubarb/grow-rhubarb.htm
As soon as it comes out of the ground, it's going to seed.
This article will help you, refer to the section "How to Keep Rhubarb from Going to Seed":
https://www.gardeningknowhow.com/edible/vegetables/rhubarb/rhubarb-bolting.htm
If a rhubarb plant is flowering, can't that be used to grow a new plant? I have a plant that I cultivated from an older plant a few years ago. It has a "flower" on it (going to seed). I'd like to try to use this to grow a new plant a few feet away.
The recommended means of propagating rhubarb is by division - instructions on how to do so are found here:
https://www.gardeningknowhow.com/edible/vegetables/rhubarb/dividing-rhubarb-plants.htm
You can try propagating by using the seeds, but I read that the seedlings rarely resemble the parent plant since most rhubarb is cross-pollinated. So you would probably end up with rhubarb of poor quality. You can read more about this at the following extension website:
https://bit.ly/1HtcJl7