Hello all!

This is my first foray into the mimosa plant or the sensitive plant care and I could definitely use some help.

I have had this plant for about a year and since it has gotten to this size it has seem to grow unhealthy. It currently live in my bathroom window and the room used to be cold but I recently installed a heather and thermostat and the two plants are currently living in about 75 degree heat. The face of the plants is roughly 330 degrees North-West so it does not have the best face possible, but I recently installed a grow lamp so that may help.

One of the plants seems to be doing fine but the other is not doing so well. I really want to try and revive the buddy, I don't want to loose him.

Also, is there a fertilizer or food I should use? I could use any and all tips.

Here are some images, thanks!

Hi & welcome! I've never seen a pic of anyone's really old Mimosa pudica plant, and many sources say they are true annuals. It may soon be time to contemplate a replacement plant for your bathroom. From what you described about the spot, heart-leaf Philodendron vine would love it there.

Sensitive Plant (Mimosa pudica) is an annual, so the only way to keep it going is to collect and sow seeds.

Ok so it is a part of their natural life cycle to die and begin a new plant? How do I collect seeds?

Did it bloom? For seeds to form, there must first be blooms, that get pollinated.