Eureka Lemon

Citrus × limon 'Eureka'

fruit

Eureka is the standard grocery-store lemon: medium to large bright yellow fruit with textured skin and intensely acidic juicy flesh, nearly seedless. The tree is everbearing in mild climates, meaning fruit and flowers appear together year-round, with the heaviest crop set in late winter through early summer. Cold-tender, so it lives in pots in any climate with frost.

✅ Plant alongside

Good neighbors that attract beneficial insects or deter pests

• Lavender — Mediterranean partner that attracts pollinators and repels aphids around the citrus drip line
• Marigolds — Root exudates suppress nematodes that damage citrus feeder roots
• Basil — Strong scent confuses citrus leafminer and supports pollinators
• Yarrow — Hosts hoverflies and parasitic wasps that hunt aphids and scale

🛡️ Pest & disease prevention

Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide

• Citrus leafminer →

  Prune lightly to limit flushes of tender new growth and apply horticultural oil to young flushes when present

• Aphids →

  Blast with water, encourage ladybugs and lacewings, and avoid heavy nitrogen that drives soft growth

• Scale insects →

  Apply horticultural oil in late winter to smother overwintering scale; release Aphytis melinus as a biological control

• Spider mites →

  Mist foliage to raise humidity, hose down dusty leaves, and avoid drought stress

🌾 Harvest & storage

Eureka produces fruit most of the year, with the heaviest crop from late winter to early summer. Pick when the skin turns full yellow and the fruit feels heavy for its size; lemons soften slightly as they ripen and lose acidity if left too long. Twist gently with a small upward pull, or snip with pruners. Store at room temperature for a week, or refrigerate for up to a month.

🥗 Nutrition & benefits

About 29 calories per 100 g with 2.8 g fiber and a remarkable 53 mg of vitamin C (88 percent of the daily value). Lemons also supply citric acid and the flavonoid eriocitrin, both linked to antioxidant activity.