How to Plant a Mandarin Orange Seed

Written by kim joyce
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How to Plant a Mandarin Orange Seed
It's easy to plant a mandarin seed, but not easy to predict fruit quality. (Jupiterimages/Photos.com/Getty Images)

Cold-hardy citrus known for their red-orange fruits, mandarins originated in China. They were once thought to be hybrids derived from oranges, but DNA evidence has established that the common orange is actually a hybrid between the mandarin and the pummelo. Prized because their fruits are very sweet, easy to peel and nearly seedless, many mandarin varieties will produce fruit with seeds when they are grown near other mandarin cultivars. Most citrus cultivars will produce seed, fruit and cloned trees that are genetically identical to the parent tree. But this is not true of mandarins. Trees grown from a mandarin seed may not resemble either parent.

Skill level:
Easy

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Things you need

  • Access to a mandarin tree
  • Paper towels (optional)
  • Small polythene refrigerator bags (optional)
  • Small (2 to 4 inch) planting pots
  • Good quality sterile potting soil
  • Larger planting pots

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Instructions

  1. 1

    Extract mandarin seeds from mature fruit tree harvested directly from the tree of your choice. Do not remove seeds from fruit you find on the ground, even if fully mature, to avoid picking up soil-borne fungi that may kill seeds and seedlings.

  2. 2

    Rinse seeds thoroughly. If you can't plant them immediately, spread them out on paper towels to dry (out of direct sunlight). When seeds are fully dry, store them in polythene storage bags in the vegetable drawer of your refrigerator until you can plant them.

  3. 3

    Fill the planting pots with sterile potting mix. Plant seeds 1/4 to 1/2 inch deep, then water thoroughly so soil is fully saturated; make sure any excess water drains easily, so soil is not soggy.

  4. 4

    Place the pots in a warm, sunny window and keep the soil evenly moist until seeds germinate, usually in about two weeks.

  5. 5

    Repot the seedling trees into larger pots when they are about 4 inches tall. Continue to "pot them up" into larger containers as trees grow. Plant them into your garden --- or a 20-gallon patio container --- when trees are 2 or 3 feet tall. Slowly acclimate them to outdoor growing conditions before transplanting or moving trees outdoors.

Tips and warnings

  • For more predictable mandarin fruit, bud scions --- young cuttings --- from a favourite mandarin tree onto disease-resistant citrus rootstock that does well in your area.
  • Many of the numerous Satsuma, Clementine and common mandarin varieties are the result of chance mutations.
  • For a showy and fruitful patio display, Dr. Steve George of Texas Cooperative Extension suggests growing a mandarin tree in the centre of a 20-gallon container, then growing petunias or pansies around the rim.
  • Don't overwater mandarins, which causes their demise much more often than under-watering.

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