Gherkin: Sowing, planting and harvest calendar
How do you sow gherkins under cover?
To give your gherkins an early start, sow under cover a few weeks before outdoor planting will be possible. Work back from conditions in your garden: these plants are vulnerable to frost and cold nights. An early sowing is useful only if you can keep the seedlings warm and well lit until they move outside.
Fill individual pots with drainage holes using light, free-draining seed compost. Moisten it before placing one seed in each pot, about 1 to 2 cm deep. Cover and water gently. Maintain warmth around 20 to 25 °C and steady moisture, without leaving water in the saucer. Reusable pots are suitable; peat pots are not necessary.
When seedlings appear, often after one to two weeks, remove any covering. Put them somewhere very bright without allowing excessive heat behind glass. Avoid letting them stretch in a dark room. Keep their root balls intact and avoid repeated transplanting, because the roots are sensitive to handling. Before planting outdoors, gradually introduce the plants to sunshine and wind. Then wait for consistently mild conditions and the end of all frost risk.
How do you sow gherkins outdoors?
Sow your gherkins directly outdoors once frost is no longer a threat and the soil is warm. In a cool climate, sowing too early often leaves seeds waiting for a long time or rotting. Prefer a period of steady warmth to a fixed date. Choose a variety suited to your climate and outdoor growing.
Set aside a sunny plot sheltered from wind, with fertile, well-drained soil. Prepare each growing spot with well-rotted compost and break the surface into fine crumbs. Sow two or three seeds per spot, about 1 to 2 cm deep, then cover and water without washing soil away. Mark the sowings and maintain even moisture until seedlings appear.
Protect young seedlings from slugs. If you use a cloche or fleece for warmth, ventilate once sunshine becomes strong. Thin by cutting weaker seedlings to retain one vigorous plant at each spot without uprooting its neighbours. Allow enough room for trailing stems or add supports for your chosen growing method. As flowering approaches, adapt any cover to the variety’s pollination needs: parthenocarpic gherkins can form fruits without pollination.
How do you plant gherkins?
Plant your gherkins when their root balls are well developed and warm weather has settled in. Wait until frost risk has passed and nights stay mild, around 12 °C or above. Do not assume an unheated greenhouse protects against every cold night. Before moving plants raised under cover outdoors, gradually acclimatise them to sunshine, wind and temperature changes.
Prepare fertile, well-drained soil in a sunny, sheltered spot. Add mature compost if the soil needs it, without putting fresh manure against the roots. Water the pots before planting and remove them carefully. Keep the root ball whole: teasing apart or tearing roots can slow establishment.
Set each plant at the depth it grew in its pot, without burying the stem base. Fill around it, firm gently and water. Adapt spacing to the variety’s growth and whether stems will trail or climb. If you choose a trellis, secure it firmly at planting time to guide stems and make later picking easier. Add mulch while keeping the crown clear, then check root-ball moisture during the first few days. Watch for slugs around the young leaves.
How to care for this plant
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Install plant supports
If you grow this plant vertically, fit a sturdy trellis when planting it out. Guide stems with soft ties and check them as it grows. No support is needed if you let it trail on the ground.
When do you harvest gherkins?
Pick your gherkins young, green and firm, at the size suited to their variety and your intended preparation. For small pickled gherkins, harvest very frequently: fruits can grow quickly and exceed the size you want between pickings. Do not wait for full botanical maturity, which brings larger seeds and often yellowing skin.
Check plants daily at peak production and gently lift leaves to find hidden fruits. Support each gherkin and cut its stalk with a clean tool, without pulling or tearing the vine. If a variety has small prickles, handle its fruits carefully. Remove oversized fruits too: regular picking helps the plant continue cropping.
Keep the harvest in the shade, then refrigerate it for a short wait. Prepare it promptly to preserve firmness and discard damaged or rotting parts. For vinegar pickles or fermentation, use a tested recipe and follow its proportions, processing and storage conditions. Do not replace these steps with a simple jar of salted water. Sort fruits by size if the recipe requires it so you can follow its preparation correctly.
Gherkin
- Type : Vegetables
- Subtype : Fruiting vegetables
- Botanical Family : Cucurbits
Characteristics
- Lifecycle : Annual
- Exposure : Full Sun
- Frost Hardiness : Frost Sensitive
- Cultivation Difficulty : Easy
- Mature height : 50 cm
Sowing & Planting
- Greenhouse Growing : Not Required
- Sowing Depth : 2 cm
- Plant Spacing : 60 cm
- Row Spacing : 120 cm
Maintenance
- Maintenance : Moderate
- Water Requirements : High
Other characteristics
- Soil Type : Humus-rich
- Soil pH Preference : Neutral
- Pest Sensitivity : Moderate
- Disease Sensitivity : Moderate
- Weed Sensitivity : Moderate
- Pollination : Insect-pollinated
- Propagation : Sowing