At a glance
Garlic is one of those crops that rewards the minimal effort you put into it disproportionately well. Plant it in October, ignore it through winter, weed occasionally in spring, and by June or July you’ll have a harvest of full, firm bulbs that keep for months. It takes up very little space in a raised bed, improves soil drainage as the roots break up the growing medium, and homegrown garlic genuinely tastes better than anything you’ll find in a supermarket.
The key with UK garlic growing is choosing varieties suited to our climate and getting the timing right. This guide covers everything based on four years of growing garlic in Greater Manchester – an unforgiving climate for anything that doesn’t like cold, wet winters.
Best garlic varieties for UK gardens
| Variety | Type | Plant | Harvest | Flavour | Verdict |
|---|---|---|---|---|---|
| Solent Wight | Softneck | Oct-Nov | Jul | Mild, sweet | Best all-rounder |
| Elephant garlic | Hardneck | Oct-Nov | Jun-Jul | Mild, leek-like | Great for roasting |
| Provence Wight | Softneck | Oct-Nov | Jul | Strong, classic | Good storage |
| Purple Wight | Hardneck | Oct-Nov | Jun | Rich, complex | Excellent flavour |
| Germidour | Softneck | Oct-Jan | Jul | Mild, reliable | Beginner-friendly |
Always buy certified seed garlic, not supermarket bulbs. Supermarket garlic is often treated to suppress sprouting and may carry viruses that reduce your crop. UK seed garlic suppliers – including the Garlic Farm on the Isle of Wight and most garden centres from September – sell certified virus-free stock that performs far better.
When to plant – autumn vs spring
Garlic needs a cold period (vernalisation) to develop properly divided bulbs. Without exposure to cold temperatures, it tends to produce a single undivided bulb rather than the individual cloves you want.
| Planting time | Harvest | Bulb size | Recommended? |
|---|---|---|---|
| October to November | June to July | Large – best results | Recommended |
| December to January | July | Medium – still good | Fine if you missed autumn |
| February to March | August | Smaller bulbs | Last resort only |
October planting consistently produces the biggest bulbs in the UK. The cloves get a full cold winter, establish strong roots before the ground freezes, and are ready to grow away quickly when spring warmth arrives.
How to plant garlic correctly
- 1Break bulbs into individual clovesDo this just before planting – not weeks in advance. Only plant the largest cloves from each bulb. Small cloves produce small bulbs. Save the small ones for cooking.
- 2Prepare the soilGarlic does best in well-drained, fertile soil with a pH of 6-7. In a raised bed with the 60/30/10 mix it will thrive without any extra preparation. Add a handful of general fertiliser per m² if the bed hasn’t been fed recently.
- 3Plant at the right depthPush each clove into the soil pointy-end up so the tip is 2-3cm below the surface. Too shallow and frost can heave them out of the ground over winter. Too deep and they’re slow to emerge.
- 4Space at 15cm each wayThis gives each bulb enough room to develop fully. In a raised bed you can plant in a grid pattern at 15cm x 15cm – a standard 1.2m x 2.4m bed will hold around 96 cloves.
- 5Mark the rowsGarlic looks like bare soil for weeks after planting. Mark the rows clearly so you don’t accidentally dig it up or plant something else on top.
Care through the growing season
Garlic is genuinely low-maintenance once planted:
- Weed regularly from March onwards – garlic doesn’t compete well with weeds and the bulbs will be significantly smaller if surrounded by competition.
- Water only in very dry spells – garlic is more drought-tolerant than most vegetables. Overwatering causes bulbs to rot. Only water if the soil is genuinely dry for 2+ weeks.
- Remove scapes on hardneck varieties – the curly flower stem that appears in late May or June. Removing it diverts energy into bulb development rather than seed production. The scapes are edible and delicious.
- Stop watering completely in June – as the foliage starts to yellow, stopping water allows the outer papery skin to form properly. This improves storage life.
Watch for rust – orange pustules on the leaves indicate garlic rust, a fungal disease common in UK gardens. It rarely kills the plant or ruins the harvest but spreads easily. Remove and bin (don’t compost) any heavily affected leaves and ensure good air circulation between plants.
When and how to harvest
The timing of harvest makes a significant difference to bulb quality and storage life:
- Harvest when approximately half the leaves have yellowed and died back – typically June for early varieties, July for later ones
- Don’t wait until all leaves are yellow – by then the outer papery wrapper has broken down and the bulbs won’t store well
- Loosen the soil with a fork before lifting – pulling can break the stem and damage the bulb
- Lift carefully and brush off loose soil – don’t wash the bulbs
How to store garlic
Properly cured garlic stores for 6-9 months – far longer than supermarket garlic which has usually been in cold storage for months already by the time you buy it.
- Cure first – lay harvested bulbs in a single layer in a warm, airy place out of direct sunlight for 2-4 weeks. A shed or greenhouse is ideal.
- Once cured – store in a cool, dry, well-ventilated place. A mesh bag, old tights or a traditional garlic plait all work well. Do not store in a sealed container or in the fridge.
- Check regularly – remove any bulbs showing signs of mould or softness before they affect the rest.
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Garlic is genuinely one of the most satisfying crops to grow in a UK raised bed – low effort, long harvest window, and the flavour difference between homegrown and supermarket is remarkable. For more on planning your raised bed for maximum production throughout the year, read our UK seasonal planting guide to see where garlic fits into your year-round growing calendar.
