How to Grow Citrus Trees in a Greenhouse

Written by tiffani ice
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How to Grow Citrus Trees in a Greenhouse
Citrus trees can be grown indoors. (Lemon tree image by Timo de Looij from Fotolia.com)

In some environments, extreme heat or frost can make it difficult to plant a thriving citrus tree. When the weather does not permit citrus tree growing, it is still possible to grow a hearty citrus tree in a greenhouse, or growing facility. Citrus trees take up a large amount of space in a greenhouse, but the citrus smell fills the air more than any flower.

Skill level:
Easy

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Things you need

  • Bare root citrus tree
  • Large container with drainage hole
  • Well-draining potting soil
  • Citrus fertiliser
  • Grow light or a fluorescent shop light
  • Hand truck or dolly

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Instructions

  1. 1

    Pour the well-drained potting soil into a large pot, filling it about a quarter of the way full. Plant the citrus tree by placing the tree in the pot, which should have one or more drainage holes. Fill the remainder of the pot with soil until the root collar is barely above the soil. Pat the soil firmly so that there are no air pockets.

  2. 2

    Place your trees in the greenhouse. Place them around the edge of the structure neatly on the southern wall, since this is where they will get the most heat and light. Make sure the trees are not crowded with one another, as they will need proper ventilation as well.

  3. 3

    Water the citrus trees so that the top inch of soil is wet to the touch, and don't over water the trees to the point when the water start coming out of the drainage hole. Do this by using a slow hose or watering can. Before you water again, make sure it feels dry to the touch.

  4. 4

    Fertilise every 30 to 60 days during the warmer months, and every 60 to 90 days during colder months. Use plant food with a N-P-K of a 3-1-1 ratio. This type of soil has a perfect amount of nitrogen needed for the plant. Do not fertilise the citrus tree during the cold winter months.

  5. 5

    Prune the small sprouts from the base of the tree whenever they begin to grow. This will help prevent sprouts from stealing water from the tree.

  6. 6

    Repot citrus trees in the spring, using a container that is at least 2 to 3 inches larger than that of the previous pot.

Tips and warnings

  • Most citrus trees require little to no pruning unless branches are dying. Make sure the plant is not in direct sunlight next to the greenhouse door to avoid burning.

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