How to Repot a Lemon
Repot a Lemon tree every 2 to 3 years into a pot that's 2 to 3 inches wider than the current pot. Use a well-draining citrus or houseplant mix with extra perlite. Late spring through early summer is the best window, after the last frost and before peak bloom.
How to Know It's Time to Repot
Lemon trees grow vigorous roots that fill a pot fast, especially in the first few years. Watch for these four signals when growth slows or fruit set drops off.
-
1Roots circle the bottom of the pot or push out through the drainage holes.
-
2The plant has roughly doubled in size since you last potted it up.
-
3Soil dries out within a day of a thorough watering during active growth.
-
4Fewer or smaller fruit appear than the year before, even with good light and feeding.
One sign on its own can have other causes, so wait until two or more line up before repotting. Most Lemon trees need a fresh pot every 2 to 3 years, with young trees sometimes needing it sooner.
The Best Time of Year to Repot
Lemon trees repot best when warmth and bright light help the roots heal fast. Late spring through early summer is the sweet spot, after the last frost but before the heaviest bloom and fruit set of the year.
Avoid repotting in fall or winter, when growth slows and freshly disturbed roots are slow to recover. Use the map below to find your window.
How to Choose a Pot and Soil Mix
Pot Size
Move up to a pot that's 2 to 3 inches wider than the current pot. Lemon trees grow into substantial small trees with deep, vigorous roots, so the wider step keeps the plant stable and gives the roots enough fresh soil for two or three years of growth.
Pot Material
Glazed ceramic and plastic are both good fits for Lemon. They hold moisture long enough between waterings, which matters for a citrus tree that wilts fast in dry soil.
Terracotta works in humid climates or for growers who like watering more often, since the walls breathe and reduce rot risk. Whichever material you pick, make sure the pot has drainage holes. Citrus roots rot fast in standing water.
Soil Mix
Mix two parts standard potting soil with one part coarse perlite for the well-draining blend Lemons want. A pre-mixed citrus or cactus blend works just as well, since both are formulated for the fast drainage citrus roots need.
Skip moisture-control formulas and dense peat-heavy mixes. Both hold too much water for citrus roots and lead to rot.
How to Repot a Lemon, Step by Step
-
1Water the day before. Give the plant a thorough drink the day before repotting. Moist soil holds the root ball together when you slide it out and keeps the fine feeder roots from tearing.
-
2Pick the new pot. Choose a pot that's 2 to 3 inches wider than the current pot, with drainage holes. Layer an inch of fresh mix in the bottom so the root ball will sit at the same height it did before.
-
3Slide the tree out. Tip the pot onto its side and gently work the root ball loose. Avoid pulling on the trunk or branches. If the tree is stuck, run a butter knife around the inside edge of the pot to release it.
-
4Loosen the roots. Gently untangle any roots that have wound themselves into a tight circle at the bottom. Trim away any sections that are black, mushy, or smell sour. Healthy citrus roots are firm and pale tan or cream-colored.
-
5Set it in the new pot, graft up. Center the tree at the same depth it was growing before, with the graft union (the swollen knob at the base of the trunk) at least an inch above the soil. Burying the graft can rot it or cause the rootstock to throw its own shoots. Fill in around the sides with fresh mix.
-
6Water and place in full sun. Water slowly until you see it run out the drainage holes. Set the tree somewhere with bright direct light, ideally a south-facing window or outdoors after acclimation. Hold off on fertilizer for 4 to 6 weeks so the roots can heal.
What to Expect After Repotting
Weeks 1 to 2
Dropped fruit, yellowing lower leaves, or a few dropped leaves are normal as the roots settle into their new pot. The tree is shedding what it can't support while the roots heal.
Keep the soil lightly moist but not soggy, give the tree bright light, and skip fertilizer for now. Resist the urge to move the pot around while the tree is recovering.
Weeks 3 to 6
Fresh leaves unfurling along the branches and new bud formation are the signals that the tree has rooted in. From here, you can move the pot back to its usual spot and ease into your regular watering rhythm.
Start half-strength liquid citrus fertilizer once you see clear new growth, and build up to full strength over the next two or three feedings. Lemons are heavy feeders during bloom and fruit set.
Got More Questions?
About This Article
