How-to: Bearss / Persian lime

01 Quick spec

~32°F

Damage near freezing

Pot only

Never in-ground here

Summer–fall

Main harvest

The Zone 8a reality: the Persian lime is the least cold-hardy citrus we'll attempt — it's damaged at or just below freezing, and our mid-teens °F hard freezes would kill it without question. There is no in-ground option: it lives its whole life in a large container that overwinters in the 16×40 greenhouse. Treat it as a movable plant, not a landscape tree.

02 Growing it here

Pot, mix & placement

Plant in a 20–25 gallon pot on a wheeled base — mobility is the whole point. Use a fast-draining citrus mix (potting soil with bark and perlite); limes resent wet roots. Give it full sun and warmth all summer on the south side, and feed with citrus fertilizer through the growing season.

Overwinter in the greenhouse

As soon as nights approach freezing, the lime goes into the greenhouse for the winter — don't try to ride out a freeze outdoors under cloth like the hardier types. Inside, water sparingly (cool roots need little), keep good light, and watch for pests. Move it back out only after spring frosts are reliably done, easing it back into full sun over a few days.

03 The year

When	What
Winter	Sheltered in the greenhouse; minimal water, no feeding, watch for scale.
Spring	After last frost, move outside and harden off; repot if rootbound; first feeding. Bloom begins.
Summer	Heavy water and feeding; heat-loving and productive — fruit sets and sizes.
Late summer–fall	Main harvest — pick green and juicy; they yellow if left too long.
First frost warning	Back into the greenhouse for the season — no gambling with this one.

04 Problems & what to watch

Cold damage

This tree's tolerance is razor-thin — leaves and fruit suffer at freezing, and a hard freeze is fatal. The plan is simple: it must be under cover before the first real cold. Never leave it out hoping a forecast holds. If it does take a chill, wait for spring growth before cutting anything back.

Scale, pests & watering pots

Crowded winter quarters invite scale, mealybugs, and spider mites — inspect and treat with horticultural oil before and during the greenhouse stay. In summer the pot dries fast; check daily in heat, but never let it sit waterlogged. Yellowing leaves usually mean overwatering or a feeding gap.

05 Harvest & beginner mistakes

Item	Note
When to pick	Deep green and heavy with juice — they're best slightly before they turn yellow.
How to use	Seedless and aromatic — juice for drinks, cooking, and preserving; the zest is fragrant too.
Yield	A healthy potted tree gives a steady summer crop — enough for the kitchen and then some.

Beginner mistakes to skip: ever planting it in the ground; leaving it outside into the first freeze; a pot too heavy to move; soggy soil; and forgetting to treat for pests before it joins the other plants under glass for winter.