Squash Seedlings

So I’m new to gardening and recently sprouted and planted nice spaghetti squash seedlings. So far they are doing great! However, we are renting and don’t have access to plant anything In the yard. Has anyone ever tried to plant/grow squash indoors? We have a patio with full sun and was wondering if a huge pot or grow box would be sufficient. We have many trellis’s for the squash vines to climb. So far they are in peat pots with 3 leafs on each seedling. Most have been planted in an organic soil with the first 2-3 inches being a mix of soil and a 2-2-2 fertilizer.

Any advice will be helpful!

Hi there Serena,
Welcome to Permies!
Yes, growing plants is a wonderful thing to do - good on you not to let anything stop you!
It would be a good idea to try and grow them out in the patio. Squash loves a sunny, warm location, rich soil and regular watering.
When you move your seedlings outside from the apartment, be mindful with letting them get used to the UV rays of the sun gradually.
My method is to do the moving-out on a cloudy day and also to put them in a spot (still in their original pot) where the sunlight doesn't get to them all day long.
After 2-3 days I transplant the seedlings to their final spot. It's best to transplant your seedling with the whole soil clump that comes from the seedling pot.
Water them before and after transplanting and then leave to recover for 3-5 days. After that water them if they look thirsty (or stick your finger into the soil to feel if it's dry) .
It's normal that the plants look sad after transplanting. They get stress from such a change. They usually perk up again within 1-2 days.
A huge pot or a grow box should work well for your spaghetti squash. Keep in mind that the plants need about 1m2 (one square meter) of space per plant.
Some squashes are vining, for those trellising would work well. Others grow from a central point like a rosette.
Harvest your squashes when they're small to medium in size. If you let the fruit grow really large, the plant starts producing seeds and will put all its energy to making that one fruit with seeds (stops producing more fruit).
It's actually a good idea to let one plant (or a couple) produce such a seed-producing squash. Save seeds!
Find out more about saving your own seeds and why it's such a good idea here.
Good luck!

Welcome to the forum and welcome to gardening.

Are your trellises strong enough to bear the weight of the large spaghetti squash?

Yes, transplant them each into big pots.

Nina has given you some great advise.

I have only grown them once when I had space for the long vines.

Enjoy your gardening attempts!

You will want at least a 5 gallon pot and probably more.  You want to transplant soon as squash is often hard to transplant successfully as it gets bigger.