How to Grow Oranges
Citrus × sinensis
The classic sweet citrus — needs more sustained heat than lemons and a long, frost-free season to fully sweeten.
By the Plants by Zone Editorial Team · Reviewed June 1, 2026
About oranges
Sweet oranges are longer-season, more cold-sensitive citrus than lemons, needing a sustained stretch of warmth to develop full sugar and color. They are self-fertile and productive once established, but young trees and open flowers are both frost-tender, which is why commercial groves cluster in the mildest citrus belts. Container growing works in colder climates, though fruit is often smaller and less sweet than grove-grown oranges from a long, hot season.
When to plant and harvest oranges
Timing is relative to your frost dates. Find your USDA zone for exact dates, or browse the month-by-month calendars.
Start seeds indoors
Not applicable — plant a grafted nursery tree; a seed-grown orange can take a decade or more to fruit and will not match the parent variety
Transplant outdoors
Outdoors after all frost danger, once nights stay reliably above 50°F; container trees can move out for the frost-free season
Direct sow
Not applicable — nursery trees only
Harvest
Fall through spring depending on variety, after months of ripening on the tree
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How to grow oranges step by step
- 1
Choose a grafted tree suited to your climate — navel for eating fresh, Valencia where the season is long enough for its later harvest.
- 2
Plant in the warmest, sunniest, most frost-sheltered spot in the garden, or in a large well-draining pot.
- 3
Water deeply and let the topsoil dry between waterings; oranges tolerate drought far better than boggy soil.
- 4
Feed monthly in the growing season with a citrus fertilizer containing iron, zinc, and manganese.
- 5
Protect flowers and young fruit from any late cold snap — frost cloth or moving pots indoors can save a crop.
- 6
Be patient at harvest: oranges color up well before they are fully sweet, so taste before picking in quantity.
Common problems growing oranges
⚠ Fruit stays sour or bland despite good color
Oranges color before they sweeten — cool nights and time on the tree build sugar, so wait past the color change and taste-test rather than picking on looks alone.
⚠ Frost damage to flowers or young fruit
Cover trees with frost cloth on cold nights or move container trees under shelter; established trees tolerate more cold than open blossoms or small fruit.
⚠ Yellow mottled leaves and stunted growth
Check for citrus greening (HLB), spread by the Asian citrus psyllid, especially where it is established — remove and report suspect trees, as there is no cure.
⚠ Sticky leaves with black sooty mold
Aphids or scale excreting honeydew — treat with horticultural oil and encourage ladybugs.
✗ Keep away from
🧺 Harvesting oranges
Oranges hold well on the tree once ripe, so there is no rush — but they do not continue to sweeten after picking, so taste one before harvesting a batch. Clip the stem rather than pulling to avoid tearing the peel, and expect the sweetest fruit after a stretch of warm days and cool nights, which deepens both color and sugar.
Oranges: frequently asked questions
When should you plant oranges?＋
In most regions you transplant outdoors after all frost danger, once nights stay reliably above 50°F; container trees can move out for the frost-free season. Timing is relative to your last frost, so find your USDA hardiness zone for the exact planting dates where you live.
Why is my orange tree not fruiting yet?＋
Grafted trees typically need three to four years to bear a full crop, and even earlier flowers are often best pinched off so the young tree puts energy into roots and growth instead. A seed-grown tree takes far longer and may never fruit reliably.
Can I grow an orange tree in a cold climate?＋
Only in a container that you move indoors before frost — oranges need more sustained warmth than lemons to size and sweeten, so expect smaller, less sweet fruit than a grove-grown tree in a hot climate.
Sources & review
Written and maintained by the Plants by Zone Editorial Team. Planting times are based on USDA hardiness zones and NOAA frost-date normals, with care guidance drawn from Cooperative Extension sources. Last reviewed June 1, 2026.
USDA Plant Hardiness Zone MapNOAA U.S. climate normalsCooperative Extension
Grow oranges in your zone
See exactly when to plant and what else to grow alongside oranges, tailored to your USDA hardiness zone.
When to plant oranges by zone:
