Pomegranate, Papaya, Figs are some of the other fruit trees that can be successfully grown indoors
Dwarf fruit trees, in addition to be aesthetically appealing and pleasantly fragrant in an indoor setting can provide years of tasty fruit. Most Dwarf fruit trees are the result of grafting a fruiting variety of tree onto dwarf rootstock, . Sour citrus such as lemons and limes are the most common.
Once you've received your rootstock or plant as the case may be, you should transplant it to a suitable container , one which allows space for the plant to grow and mature. Any container / pot you use should have drainage holes in its base for excess moisture, as well as a water catcher at its base.
Use light and airy potting soil for most fruit trees, a light [low clay], well draining soil mixture with an abundance of peat, and perlite or vermiculite. Adding addition perlite or vermiculite to any soil you purchase is advisable. Never use soil from outdoors. Add soil up to the line on the tree stem where discoloration from the soil it was in at the nursery stops. Be certain to leave enough head space at the top of your planter to water thoroughly without washing dirt out.
Water and Humidity
Water your tree at regular intervals, but make certain you allow it to dry between watering. When the soil is dry for several inches below surface it's time to water. Over watering can lead to various disease issues. If the leaves start to yellow, you are over watering or the plant is not draining properly. You may also want to consider .
Fertilize monthly - zinc, iron, and manganese are the key ingredients for indoor Citrus trees. Most quality multipurpose fertilizers contain these ingredients. There are also specifically formulated fertilizers . Excessive fertilizer can result in overgrowth of foliage at the expense of the fruit and possible dieback due to salt accumulation. For other indoor fruits follow the label directions. See: Understanding Fertilizer Labels.
You can prune your indoor citrus trees when need be. Remove any crossed branches and branches that are growing too low Also remove any branches that are growing below the graft union.
Many trees, particularly citrus trees will produce an abundance of blossoms, many of which will never produce fruit. To increase the amount of fruit-bearing blossoms on your tree you will need to hand pollinate. Unless your plant is self pollinating, as some are, the flowers need to be pollinated periodically by very gently moving a swab or small dry brush in a circular motion deep inside the flower, then brushing the stigma, which is made up of long fragile slender looking tubes just inside the flowers tip . See Indoor Pollination
Requirements will naturally vary slightly from plant to plant. Be certain to check out the individual planting guides for various cultivars, as well as planting instructions that may have come with the plant or root stock.