i just ate an orange and i got the seeds from it. if i plant it will it turn intoa orange tree or do i need to buy one?

yes, I started one from seed about 10 years ago, it's about 5 feet tall now... I grow it indoors in the winter (I'm in WI), in an east facing patio window, and bring it outdoors for summer....
when the tree sets fruit, it will not be edible, but I love to grow stuff anyways
if you want orange trees that bare edible fruit, you need to buy them

Sure, I do it all the time for my grand kids!
I soak the seeds in warm water for a 24 hour period, then I plant them about 1/4 of an inch into potting soil.
I keep them in the sunniest area possible with saran wrap over the pot so moisture and warmth stays in the pot.
When they germinate, I take the Saran wrap off and move them closer to the window and insulate the pot itself from the cold glass of my Massachusetts winter window.
usually with a towel wrapped around the pot.
I have one tree that is 13 years old, and is in a 3ft.x3ft. pot.
In the spring ,summer,and fall it lives out on my deck.
November to May it takes up my kitchen in front of the slider.
Now I have a Madagascar Lemon, and a tangerine growing..

If you decide to buy a citrus, look carefully for signs of mealy bugs, citrus are VERY susceptible to mealy bugs, and the darn things spread like wildfire and are imposable to get rid of!

It will grow into an orange tree, but the tree may not bear fruit similar to the orange you just ate. Most fruit trees are propagated by grafting cuttings known as scions onto a rootstock. This is to ensure that all fruits of one variety are the same because they would have the same DNA. If you want to have an orange tree, I would recommend selecting a variety of orange you would like to grow and buying a tree. You may want to buy another of a different variety for a pollinator. If there are other orange trees nearby that would not be necessary.

well...you could but i depends where you are from-hot places will be the best

ntroduction
Healthy trees and a sweet, delicious harvest are the goal as you tend your oranges throughout the year.
Instructions
Difficulty: Moderately Easy
Things You'll Need

* Compost Makers
* Fertilizers
* Garden Hoses
* Mulch
* Orange Trees
* Shovels

Steps
1
Step One
Purchase an orange variety adapted to your area. For example, Washington navels grow well in California, while Valencia oranges are adapted to Arizona, Texas and Florida, as well as California.
2
Step Two
Plant the tree in a warm, sunny area where the soil drains well.
3
Step Three
Mulch to conserve water.
4
Step Four
Water the tree deeply once every 7 to 10 days in midsummer. Water less often if it rains or if the weather is cool.
5
Step Five
Fertilize every four to six weeks from February to August.
6
Step Six
Protect trees from frost if temperatures are forecast to drop below 28 degrees F.
7
Step Seven
Harvest oranges when they taste sweet. Timing will vary by variety and growing area.
Tips & Warnings

* Most nurseries in citrus-growing regions offer a nice selection of container-grown orange trees.
* You can grow citrus from seeds, but there's no guarantee that the seedling will be identical to its parent. A seedling can take from 2 to 15 years to bear fruit.
* The more likely that winter temperatures will fall below 28 degrees F where you live, the less likely you'll harvest a quality crop.

no you have to buy a tree not the seed