Spaghetti squash is ready to harvest when the color is uniform and the shell is hard. Try to "cut" the squash with your fingernail. If it doesn't go in, the squash is ripe and ready to use. It should be hard to cut in half.
clean
when the corn looks ready
it turns green
if you want to know, put your mouse over it. if it says "something% ready" it does. if it says 100%ready, then click it and click harvest :)
Different fruits and vegetables have various ways of letting you know that they are ready for harvest. Many root crops will show their "shoulders" when ready. Many fruits will produce a distinct fragrance when ready. beans will get to be the desired length and thickness for eating. It just depends on what you happen to want to eat for your next meal.
I am pretty sure but i don't quite know. GO ON GOOGLE!
how do you know when is time to harvest your giant cabage
It depends on the type of crop. Trees will last until you harvest them (as far as I know), and other crops (except for grapes) will usually last for about a day after they are ready to harvest, then they will go bad. I do not know how long grapes will last after ripening.
Do you know when my car will be ready.
you will know when your ready and when you want to
A spaghetti measurer is used to determine the amount of spaghetti for one serving. Depending on the size of your spaghetti measurer, I have seen up to four servings, you would be able to know how much spaghetti to cook for a certain number of people.
we get vitamin A from squash so it is good for our eyes, you know.