I got some snapdragon and cherry blossom and i just planted the plants in a pot i need some tips on how to care for them so they can look healthy and grow bigger

Hope you are in a warm zone, osorio? It would help us a lot to know where approximately you are. (there are spots in your personal profile to put your city, and climate zone so they appear automatically in your posts)

Snaps are annuals, and will bloom nicely through the winter here in Florida. They need regular water (pots dry out quickly, and ever more quickly as the plants get bigger) but it depends upon your climate (dry air or humid, how warm?) so just testing the soil with your finger at first will give you an idea how often to water.

They will also need fertilizer. Check if the potting mix you used has fertilizer already added. If not, mix it into the soil around your plants now, while they're small, and then keep an eye out for them to need more in a couple of months. Leaves will be paler, blooming will slow down. A pelleted time-release fert like Osmocote (my fave) will save you from having to remember to mix liquid fert every week or two. In really warm and humid areas, the pelleted fert is used up much faster than the 3 to 4 months it says on the label.

A sunny spot will be good through the winter, but as it heats up in spring, morning sun and shade in the afternoon might keep them going longer. Also you will need to deadhead them. Each time a flower stem finishes blooming, cut it off above the first leaves so that the plant doesn't go into seed production. This will keep the plants producing new flower stems.

If you keep them going through to next spring, you may need to move them to a bigger pot. They'll tell you, by wilting in the heat of the afternoon because they're using up all the water the pot can hold before the day cools off.

And that appears to be a terracotta pot? If it is indeed terracotta, be aware that the unglazed pots dry out MUCH faster than glazed or plastic pots.

More on the subject of soils: ground dirt is for walking on, not for container plants. You can use a formulated bagged potting mix or make your own, but potted plants have rather specific requirements that need to be met in order to excel. No amounts/types of post-planting fertilizer, watering or sun exposures will fix it, it's simply a matter of healthy root development and the exchanges that happen beneath the soil's surface layer.

I live in zone 8 and have had several snapdragon plants that come back every year. And a few seedlings that popped up. But they were planted in the ground.

I use native soil in my pots...?? It seems to work fine.

Perhaps @osorio661 is outside working in the garden?

Deb, I'm coming over there and stealing some of your native soil.

Yep, I was just going to say the same thing! It really depends what the garden soil is like. Here, pure sand, and in Utah in "my other" garden at my daughter's house, clay clay clay. Ick. Both would not work in a pot at all.