PlantWhy

Mandarin

Citrus reticulata · Tree/Shrub

A compact citrus tree with fragrant white flowers and sweet, easy-to-peel fruit. It is a little hardier than oranges and adapts well to large pots, so it can spend summer outside and winter in a bright, cool room.

Mandarin
Photo: 4028mdk09, CC BY-SA 3.0 · Wikimedia Commons
💧WaterWhen top 2 in is dry (estimated)
☀️LightFull sun, 6–8 hours
🐾PetsLeaves and peel harmful

Care at a glance

Light
Full sun, 6–8 hours; brightest window in winter
Water
Deeply when the top 2 in is dry; less in winter
Soil
Well-drained, slightly acidic citrus mix; pH 6.0–7.0
Temperature
Best 65–85 °F; damaged below about 25 °F
Spacing
12–15 ft in the ground; dwarf types 6–8 ft
Container
At least 10–15 gallons with drain holes
Harvest
Fruit ripens late autumn to winter (estimated)
Lifespan
40+ years (estimated)

When?

Plant or repot in spring once frosts are over. Potted trees can go outside when nights stay above 50 °F and come back in before the first frost.

Step by step

  1. Choose a grafted tree; seedlings take many years to fruit.
  2. Use a free-draining citrus or cactus-type mix and a pot with several holes.
  3. Keep the graft union above the soil and do not pile mulch against the trunk.
  4. Water deeply, then let the top 2 in dry; soggy roots cause leaf drop.
  5. Feed with a citrus fertilizer containing magnesium and iron from spring to late summer.
  6. Thin small fruit if the crop is very heavy, so branches do not break.
  7. Prune lightly after harvest to remove crossing or dead wood.
  8. Leave fruit on the tree until fully colored and sweet; it does not ripen after picking.

Common problems

Yellow leaves with green veinsIron or magnesium shortage; use a citrus feed and check soil pH.
Sudden leaf drop indoorsCold drafts, dry air or a sudden move; keep conditions steady.
Sticky leaves and black moldScale insects or aphids; wipe off and rinse leaves.
Fruit falls earlyDry roots or very hot spells; water more evenly.

Pets

Leaves, peel and essential oils are harmful to cats and dogs. If in doubt, ask your vet.

Related tools

Soil and mulch calculator

Similar plants

Lemon TreeOrange treeOlive Tree

Sources

This page is general guidance; no pesticide doses are given.