At a glance
Spinach is one of the most rewarding crops a UK gardener can grow – fast from seed to plate, highly nutritious and far superior in flavour to anything available in a supermarket bag. The challenge is timing. True spinach bolts quickly in hot weather and runs to seed within weeks in a British summer, which puts many gardeners off after a disappointing first attempt. Understanding which type to grow in which season, and keeping up with regular succession sowings, turns spinach from a frustrating crop into one of the most reliable in the kitchen garden.
There are also two distinct plants commonly called spinach in UK gardens – true spinach (Spinacia oleracea) and perpetual spinach or leaf beet (Beta vulgaris), which is actually more closely related to chard. They behave very differently and understanding which one suits your growing situation is the starting point for success.
Best varieties for UK gardens
| Variety | Type | Season | Bolt resistance | Verdict |
|---|---|---|---|---|
| Medania | True spinach | Spring and autumn | Good for true spinach | Best spring variety |
| Perpetual Spinach | Leaf beet | Year round | Excellent – rarely bolts | Best for summer |
| Scenic | True spinach | Spring and autumn | Very good | Good all-rounder |
| Giant Winter | True spinach | Autumn and winter | Hardy, overwinters | Best for late season |
| Bordeaux | True spinach | Spring | Moderate | Ornamental red stems |
Grow perpetual spinach through summer instead of true spinach. Perpetual spinach is not strictly spinach at all – it is a leaf beet – but its large, dark leaves have a similar flavour and it is dramatically more bolt-resistant than true spinach. A plant sown in April will still be producing leaves in October without running to seed. For continuous summer harvests it is far more reliable than trying to keep true spinach going through July and August.
Sowing and germination
True spinach is sown outdoors from February (under cover) or March (direct) through to May, then again from August to September for autumn and overwintering crops. Avoid sowing in June and July – the combination of long days and heat triggers bolting almost immediately.
- 1Sow direct in drills 1cm deepDraw shallow drills 30cm apart. Sow seed thinly at roughly 2cm intervals. Cover lightly and water gently. Germination takes 7-14 days depending on soil temperature.
- 2Thin to 7-10cm when seedlings establishThin in stages – first to 5cm, then to final spacing once plants are established. Thinnings can be eaten as microgreens immediately.
- 3Sow every 3 weeks for continuous harvestA short row every three weeks from February to May gives continuous harvests from April to July. Resume sowing in August for autumn crops.
Care and watering
- Water consistently and generously – spinach needs more water than most salad crops. Drought stress is the primary trigger for bolting. Water deeply every 2-3 days in dry weather rather than light daily watering.
- Feed with nitrogen – spinach is a leafy crop that responds well to a high-nitrogen feed every 2-3 weeks during the growing season. A dilute liquid feed or a top dressing of blood, fish and bone encourages lush leaf growth.
- Weed carefully around young plants – spinach competes poorly with weeds in the first month. Hand weed carefully to avoid disturbing shallow roots.
- Mulch to retain moisture – a light mulch of compost or straw around established plants helps retain the consistent moisture spinach needs and reduces watering frequency.
Managing bolting
Bolting – running to seed – is the defining challenge of growing true spinach in a UK summer. The plant sends up a tall flower spike, leaves become small and bitter and the harvest is effectively over within days of bolting beginning. Prevention is far more effective than intervention once bolting has started.
- Do not sow between June and late July – this is the highest-risk period for bolt-triggering day length and heat combination
- Grow in partial shade from noon onwards through May and June
- Keep consistently watered – never allow the soil to dry out completely
- Switch to perpetual spinach for summer harvests
- Choose bolt-resistant varieties like Medania and Scenic for spring sowings
- Pull and compost bolted plants immediately – they will not recover
Remove bolting plants immediately rather than trying to save them. Once a spinach plant sends up a flower spike the leaves become unpleasantly bitter within days and the plant’s energy shifts entirely into seed production. Trying to cut the spike back rarely works. Pull the whole plant, add it to the compost and resow – a fresh sowing will be producing leaves again within six weeks.
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Harvesting correctly
Harvest spinach leaves when they are 5-10cm long by cutting individual leaves from the outside of the plant with scissors or a sharp knife, leaving the growing centre intact. New leaves regrow continuously from the centre. Alternatively, cut the whole plant 3-4cm above soil level and allow it to regrow – this produces a second and sometimes third flush of leaves before the plant eventually bolts or exhausts itself.
Harvest in the morning when leaves are at their most tender. Spinach wilts quickly after cutting – refrigerate immediately wrapped in a damp cloth or in a sealed bag. Fresh garden spinach will keep for 2-3 days in the fridge at its best, though the flavour is finest within hours of picking.
Common problems
| Problem | Cause | Solution |
|---|---|---|
| Bolting rapidly | Heat, drought or long days | Avoid June/July sowings, water consistently, grow in shade, switch to perpetual spinach |
| Downy mildew (yellow patches) | Fungal disease in wet conditions | Improve airflow, avoid overhead watering, choose resistant varieties |
| Leaf miners (pale tunnels in leaves) | Beet leaf miner larvae | Remove affected leaves immediately, cover with fine mesh |
| Slugs on seedlings | Slug damage especially at night | Slug pellets, copper tape, nematode treatment from April |
| Poor germination | Soil too warm above 25°C | Sow in evening, water to cool soil, avoid summer sowing |
Spinach is a fast and productive crop when timed correctly. Sow in the cooler months, keep well watered and switch to perpetual spinach for summer harvests and you will have fresh leaves on the table from April through to November. For more on growing productive salad crops read our guides on how to grow lettuce UK and how to grow rocket UK.
As an Amazon Associate I earn from qualifying purchases. Prices correct at time of publishing.
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