Q. I live in a 3rd floor condo that faces south. I get about 7 hours of direct sun and have containers on my patio with spinach, tomatoes and peppers that are doing well so far. I was wondering if there are any types of fruit trees that produce and thrive in a patio container? A. Yes, there are. I worry a bit about the weight that this will place on your patio. Make sure it can handle this type of load before you attempt containers there.             There are light weight soil mixes that can be used to lessen the weight load on the patio. These mixes frequently use amendments like perlite that replace heavier components of the mix.             A good citrus to grow in containers in our climate is cumquat. It is tolerant of very low Cumquat fruit about 1 1/2 inch long temperatures, as far as citrus goes, and stays very small. Tender citrus to use would be limes and calamondin, sometimes called calamansi, but they will need protection from winter cold temperatures. Citrus espalier or some might call “trellis”             You can use any of the genetic dwarf fruit trees in containers. I would trellis the tree near an available wall. If you select a genetic dwarf fruit tree the container needs to be large. Citrus in an espalier             If your patio is protected from wind and cold you might consider kiwi, passionfruit, giant passionfruit or dragonfruit.