How to grow Cucumber

At a glance

🌱 Grow your Cucumber with GardenDex

• Reminders to water it, timed to your weather and whether it's in a pot
• Frost and disease alerts for your garden, the night before
• Follow it from seed to harvest, and see what your garden grew in $
• Point your camera at any plant or bug to identify it

🗓️ When to plant

Sow seeds directly into the garden after the last frost when soil has warmed to at least 15°C (60°F), or start indoors 3–4 weeks before the last frost for transplanting.

🌰 How to plant

1. Prepare beds with compost or aged manure to enrich soil.
2. Sow seeds 2–3 cm (1 inch) deep, or transplant seedlings when they have 2–3 true leaves.
3. Space plants according to variety (bush vs. vining).
4. Water gently after planting and mulch around the base to retain moisture and regulate temperature.

💧 Care

• Feed with a balanced fertilizer every 2–3 weeks once flowering begins, or use compost tea.
• Provide a trellis, cage, or stakes for vining varieties to maximize space and airflow.
• Pinch off the growing tip when the main vine reaches the top of support to encourage side shoots.
• Mulch around plants to keep roots cool and suppress weeds.
• Remove any yellowed or diseased leaves promptly to maintain plant health.

🧺 Harvest

Pick cucumbers when they're firm, bright green, and 15–20 cm (6–8 inches) long for slicing varieties, or smaller for pickling types. Harvest regularly (every 2–3 days) to encourage continuous production throughout the season.

🐛 Common problems

Powdery mildew: Improve air circulation with trellising, avoid overhead watering, and spray with sulfur or neem oil at first sign of white coating.

Cucumber beetles: Cover young plants with row covers, remove by hand, or spray with neem oil if populations are heavy.

Downy mildew: Water at soil level only, ensure good air flow, and remove affected leaves; apply fungicide if disease spreads.

Bitter fruit: Keep plants consistently watered and avoid stress from heat or drought, as these trigger bitter flavors.

🤝 Companion plants

💚 Good neighbours: Radish, Nasturtium, Corn, Beans

⚠️ Keep apart from: Potatoes, Sage

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