What kind of sunflowers did you plant?

They are Mammoth Sunflowers and Velvet Queens.

Are you planning on putting them in the ground or keeping them In Containers? I think they need deeper soil. I know mammoth sunflowers grow to be 5 to 10 feet tall. Mine always do. They probably need more support. Also they should be about 1 to 2 feet apart from each other. Yeah, they definitely need their space.

I live in an apartment, and so they will each go into a bigger pot. I'm just not sure when to do that exactly. Will they survive the Arizona Summer outdoors?

Well, I live in New Mexico and they do fine. They just require a little more TLC. Ive read that they are drought resistant when established but mine dont seem to be at all. I have to water them sometimes twice a day. It gets so hot here and the soil dries out really quickly. Also I have to feed them alot. They are heavy eaters and the sandy soil they are in now does not hold nutrients well. Just watch the plant. If its droopy, water it. If the color changes, try feeding it. I would thin them out at 3 or 4 inches and definately put them in bigger pots. They have taproots so make sure they are deep pots. I hope this helps and good luck with your sunflowers!

Thanks for all of the advice. They are in the little peat pots, and in just a few days, one has sprouted and raced to about 6 inches tall with true leaves coming in. It is having difficulty standing, so I have some Qtips helping it, and will be transplanting it into a bigger pot today. I'm reading and debating about the peat pot - whether or not to leave it in or cut it out of it.