I want to save seeds from a spaghetti squash. Do I use the same method as the pumpkin seeds?
It is possible to save seeds with some stipulations.
First if the original plant was a hybrid, do not save the seeds. They will not reproduce true to the parent and may even be sterile.
2nd, you may have cross pollination issues. This link will help you.
https://www.gardeningknowhow.com/edible/vegetables/squash/squash-seed-harvesting.htm
I grew the squash and it had ripened and when I came back to them they had returned back to being green. Why?
Your Squash likely were just not ripe yet, they will go through a series of color changes.
Here is an excellent article that takes you through the ripening process.
https://www.gardeningknowhow.com/edible/vegetables/squash/spaghetti-squash-ripeness.htm
I'm new to gardening and I thought I planted spaghetti squash several months ago. My garden is now full of several yellow smaller squashes. I picked a large yellow one last night and cooked it like I normally would and when I opened it up. It was full of a watered substance and the squash looking flesh was mushy. I tasted it and it was edible but I just don't know what it was. I took a picture of it and would love for someone to tell me what it is. It was as large as any squash I've bought from the store. Can someone please help?!
We did not receive the image.
You may have harvested your squash too soon.
Watch for the color to change from creamy yellow to a nice dark, golden yellow.
If there is any green left on the squash it is not ripe.
If you can scratch the squash easily with your fingernail, it is not ready.
A ripe squash skin should be hard and resistant to scratching.
https://www.gardeningknowhow.com/edible/vegetables/squash/spaghetti-squash-ripeness.htm
Some of the leaves on my spaghetti squash are turning brown and dying. What is causing that and what should I do?
Leaves can become injured and damaged as the plant gets larger. Inspect the plant for signs of insects or disease.
A more serious issue to watch for is Squash Wilt. Links below will help you identify this.
I would treat it with Neem Oil as this acts as both an insecticide and fungicide.
Refresh yourself on the care requirements and watering.
https://www.gardeningknowhow.com/edible/vegetables/squash/growing-spaghetti-squash.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/signs-and-treatments-of-squash-wilt.htm
I have spaghetti squash that appeared ripe. Nice yellow color, vine dying back. I brought them in, washed them off, dipped them in diluted bleach and left them in the garage. (I did this last year and they lasted many months.) Now they are turning green again. I've planted spaghetti squash several years and never saw this before. Should I return them to sunlight?
It does sound as if they were not quite ripe to be picked from the vine.
This article does a very good job and helping you determine if and when the squash is ready to harvest.
Find a nice sunny spot to put your squash in, this should help them ripen further off the vine.
https://www.gardeningknowhow.com/edible/vegetables/squash/spaghetti-squash-ripeness.htm
I tried to prune my spaghetti squash because it was leaning on other plants. As soon as I cut the leaves, they started to wither and die. Should I cut them off the vine and allow them to ripen inside? Or leave them on the vine? This is my first garden, and it was doing well.
Leave the squash on the vine to ripen because they will not ripen properly off the vine. Your plants look like they still have enough leaves to support the fruit, but if it looks like the plant is not doing well, you can remove one fruit to reduce stress. They will probably do fine left alone though.
It is usually not necessary to prune spaghetti squash, but you can remove individual leaves that are shading other plants. Squashes can get to be quite large, so plan a large space in the garden for them next year.
Going to freeze outside and spaghetti squash is still ripening on the vine. What can I do with it?
A freeze will likely kill the vine and a hard freeze will damage the squash, so it's best to harvest them now. Depending how unripe it is, you may be able to ripen it off the vine. Here are some tips on ripening spaghetti squash off the vine:
https://www.gardeningknowhow.com/edible/vegetables/squash/spaghetti-squash-ripeness.htm