Why are some plants not suitable for growing in containers?

Fern Park, FL(Zone 9b)

I know that obviously a large tree wouldn't fit in a container, but as for everything else...why are some not suitable for containers? Dirt in a pot or dirt in the ground...if its the same dirt....why is it different? What are some plants that aren't good for containers?

Milton, MA(Zone 6a)

NOT the same dirt, to begin with. Check this article http://davesgarden.com/guides/articles/view/933/

Or the container gardening forum . . .

Some plants do not do well with their roots confined in a pot. They simply resent it and won't grow. Others may need the fresh air and sunlight to grow and won't settle for artificial light or low light. Still others may need humidity that a house can't provide. Possibly too, some needs to experience different season, even dormancy, that they can't find growing in a house. Consider also that some plants may grow too large for the average home.

I don;t think soil has much to do with it since that can be changed.

Milton, MA(Zone 6a)

My containered pots are NOT all indoors, ^_^

Fern Park, FL(Zone 9b)

Yeah, I wasn't just talking about indoor plants, but any plant in a pot...I guess the answer would be that some plants need more space for their roots to grow :)

Dublin, CA(Zone 9a)

Also in outdoor containers especially you tend to get more variation in soil temperature and moisture level than what a plant would see in the ground, that could contribute to why some things do better than others. And some plants like to grow a nice deep taproot and obviously can't do that in a pot.

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