Calamondin? I know that one well.

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Calamondin

Citrus x microcarpa

Zones 9–13

Growing

Because this citrus hybrid is a single-plant producer, you can enjoy a bountiful harvest even if you only have one tree in your garden. When planting, ensure your soil remains slightly acidic, ideally between a pH of 5.5 and 7.0, to mimic its native tropical environment. If you are growing in a container, prioritize a well-draining potting mix to prevent the roots from sitting in waterlogged soil, which can lead to decline. While the tree is hardy enough to withstand light frost, it thrives best in warm, sunny locations.

You should begin harvesting once the fruit has reached its full color and is ready to use, as these citrus fruits do not continue to ripen once they are removed from the branch. To maintain the best quality, avoid washing the fruit until you are ready to consume it, and store the unwashed fruit at room temperature. If you find yourself with an abundance of fruit, you can also utilize them for making preserves or even pickling them to extend their use in your kitchen.

Stats
Sunfull sun
Watermedium
Grow time>150 days
Height>6ft
Spacing>24in
Light
Full sun✓
Part shade✓
Shade✗
Traits
Life cycleperennial
Categorytree fruit
Growth habittree
Seasonwarm
Frost tolerancehalf hardy
Heightover 6ft
Spacingover 24in
Days to maturityover 150
Growing
Watermedium
Drainagewell drained
Soil ph min5.5
Soil ph max7.0
Propagation
Seed✓
Cutting✓
Division✗
Graft✓
Tuber bulb crown✗
Transplant✓
Container ok✓
Pollinationself fertile
Pollinator friendly✓
Toxic parts
Leaves✗
Seeds✗
Raw✗
Post harvest
Wash before storing✗
Ripens off plant✗
Curing daysnone
Shelf life1–4wk
Storage methods
Room temp✓
Cool dark✓
Fridge✓
Freeze✓
Can✓
Dry✓
Ferment pickle✓
Blanch before freezing✗
Calendar, zone 7
Not suited to zone 7. Grows in zones 9–13.