How to Grow Turnips: Your Complete Turnip Growing Guide

Turnips are often overlooked in favour of their trendy cousins. What makes turnips particularly brilliant for UK growers is their versatility and cold tolerance. Unlike Mediterranean vegetables that sulk in our changeable weather, turnips actively thrive in cooler conditions. They’ll happily grow through spring and autumn, and some hardy varieties will even overwinter in milder regions. I’ve harvested sweet, tender turnips in early March after they’ve sat through frost, and honestly, the cold seems to improve their flavour rather than diminish it.

Whether you’re after tender baby turnips for salads or larger storage roots for winter stews, understanding the growing process will help you achieve consistent results. Let me walk you through everything I’ve learnt about cultivating these underrated vegetables. Even though they may not be at the top of your list, lets learn how to grow turnips.

How to Grow Turnips

Before you start sowing, it’s worth gathering your materials and checking your growing conditions. Turnips aren’t fussy, but having the right setup from the beginning makes the process much smoother.

Essential Equipment and Materials

You’ll need surprisingly little to get started. A packet of turnip seeds is your primary requirement, and I’d recommend choosing varieties suited to your intended harvest time. For early sowings, look for quick-maturing types like ‘Tokyo Cross’ or ‘Snowball’. If you’re planning an autumn crop, traditional varieties such as ‘Golden Ball’ or ‘Purple Top Milan’ work brilliantly.

A garden rake is essential for creating a fine tilth (that’s the crumbly soil texture seeds love). You’ll also want a dibber or stick for marking drills, though I often just use a bamboo cane. A watering can with a rose attachment helps provide gentle irrigation without washing away seeds. If you’re sowing in containers, choose pots at least 20cm deep to accommodate the developing roots. You might also find how to grow potatoes in the uk helpful considering the growing method crossover.

Organic matter is your friend here. Well-rotted compost or aged manure improves soil structure, though turnips don’t need heavily enriched soil like courgettes or tomatoes do. In fact, I’ve found that overly rich soil can lead to excessive leaf growth at the expense of root development.

Soil Preparation and Site Selection

Turnips prefer a slightly acidic to neutral pH, ideally between 6.0 and 7.0. If you’re growing them as part of a brassica rotation (which you should be), they’ll appreciate soil that was limed for a previous crop but won’t need fresh lime applications. Testing your soil pH with a simple kit from any garden centre gives you valuable information, particularly if you’re struggling with clubroot, a common brassica disease that thrives in acidic conditions.

Choose a spot that gets at least four to six hours of sunlight daily. I’ve successfully grown turnips in partial shade, particularly summer crops that benefit from protection during hot spells, but they do best with decent light. The site should have reasonable drainage because waterlogged soil leads to rot and encourages fungal diseases.

Remove any stones larger than a walnut and break up compacted soil to at least a spade’s depth. Turnips aren’t as deep-rooting as parsnips, but they still need loose soil to develop properly. If your ground is heavy clay, working in horticultural grit or sharp sand improves drainage considerably.

Step-by-Step Instructions

Timing Your Sowings

Getting the timing right makes an enormous difference to your success with turnips. I’ve learnt this through some disappointing crops that bolted straight to flower without forming decent roots. The key is understanding that turnips are cool-season crops that struggle in summer heat.

Start your first sowings in early March if your soil has warmed up a bit. In colder areas like Yorkshire or Scotland, you might need to wait until late March or early April. I test soil temperature by touching it, if it feels uncomfortably cold on your bare hand, it’s too cold for germination. You’re looking for soil temperatures around 7°C or above.

Make successive sowings every three weeks through spring for a continuous supply. Stop sowing by late May, as summer-sown turnips often bolt when exposed to long days and warm temperatures. Resume sowing in late July or early August for your autumn and winter crops. These later sowings often produce the sweetest, most tender roots because they mature in cooling conditions.

Sowing Seeds Properly

Create shallow drills about 1.5cm deep using your bamboo cane or the corner of a hoe. Space rows 30cm apart, though I often use closer spacing in raised beds where I can access plants from all sides. Water the drills before sowing, this helps seeds settle into good contact with the soil.

Sow seeds thinly, aiming for one every 2-3cm. This sounds precise, but turnip seeds are reasonably large, making them easier to space than carrot or lettuce seeds. Cover lightly with soil and firm gently with the back of your rake or your hands. Label your rows with the variety and date, trust me, you’ll forget otherwise.

Germination typically takes 7-10 days depending on soil temperature. In my experience, warmer spring soil brings seedlings up faster than cold early sowings. Keep the soil consistently moist during this period but not waterlogged. A light sprinkling every evening if there’s no rain usually does the trick.

Thinning Seedlings

This is the step many gardeners skip, and it shows in their harvest. Overcrowded turnips produce all tops and no bottoms, as my allotment neighbour in Ludlow likes to say. Once seedlings reach about 2-3cm tall, thin them to 10cm apart for small salad turnips or 15cm apart for larger storage roots.

I do this in stages rather than all at once. First, remove the weakest seedlings, leaving plants about 5cm apart. A couple of weeks later, thin to final spacing, and here’s a bonus, these thinnings make lovely additions to salads with their mild, peppery flavour. Thin on a dull day or in the evening to reduce stress on remaining plants.

Water after thinning to settle soil around the roots of remaining seedlings. The scent released during thinning can attract cabbage root fly, so some growers cover rows with horticultural fleece immediately afterwards. I’ve had mixed results with this approach, but it’s worth considering if you’ve had problems before.

Watering and Feeding

Consistent moisture is absolutely critical for growing quality turnips. Irregular watering causes several problems: woody, split roots, hot, peppery flavour, and premature bolting. During dry spells, water deeply once or twice weekly rather than little splashes daily. You’re aiming to moisten the soil to root depth, encouraging plants to develop strong root systems.

I check moisture levels by pushing my finger into the soil beside plants. If it’s dry beyond the first knuckle, it’s time to water. In hot weather, turnips may need watering every other day, particularly in containers or sandy soils that drain quickly.

Feeding is where less is more. Turnips are light feeders compared to hungry crops like tomatoes or courgettes. If you’ve prepared soil with compost, they’ll likely need nothing extra. Overfed turnips produce excessive leafy growth and disappointing roots. If plants look pale or growth seems slow, a light application of general-purpose organic fertiliser works well, but honestly, I rarely bother.

Dealing with Pests

Turnips face the same pest challenges as other brassicas, with flea beetles being the most visible problem. These tiny jumping beetles create characteristic small holes in leaves, particularly on young plants. While they look alarming, moderate damage rarely affects root development. Keep plants growing vigorously with adequate water, and most will outgrow flea beetle damage.

Cabbage root fly larvae can tunnel into developing roots, making them inedible. Physical barriers work best here. Covering rows with insect-proof mesh immediately after sowing prevents adult flies from laying eggs near plants. Alternatively, placing collars around the stem base (I cut squares from old carpet or cardboard) stops flies accessing the soil.

Pigeons and other birds sometimes nibble young leaves. Netting or fleece provides protection, though I’ve found that birds are less interested in turnips than cabbages or kale. Aphids occasionally cluster on leaves but rarely cause serious problems. A strong spray from the hose usually dislodges them sufficiently.

Common Mistakes to Avoid

Sowing in Hot Weather

This is probably the single biggest mistake I see gardeners make with turnips. Unlike beetroot or chard that tolerate summer warmth, turnips are genuinely cool-season crops. When exposed to long days and warm temperatures during their early growth, they interpret this as a signal to reproduce, sending up flower stalks instead of developing roots.

I learnt this lesson properly after a disappointing June sowing that produced nothing but leaves and flower stems. If you want summer turnips, choose bolt-resistant varieties specifically bred for warmer conditions, but even these struggle in proper heat. Your best crops will always come from spring and autumn sowings.

Neglecting Crop Rotation

Turnips belong to the brassica family alongside cabbages, broccoli, cauliflowers, and radishes. Growing brassicas in the same spot year after year allows soil-borne diseases like clubroot to build up to damaging levels. Clubroot causes swollen, distorted roots and seriously stunted growth, and once established in soil, it persists for many years.

Follow a proper rotation, ideally leaving at least three years between brassica crops on the same ground. In my four-bed rotation, brassicas follow legumes (peas and beans), which naturally enrich soil with nitrogen. If you’re working with limited space, growing turnips in large containers with fresh compost each year sidesteps rotation issues entirely.

Leaving Them Too Long

Timing your harvest properly makes an enormous difference to eating quality. Small, young turnips are sweet, tender, and mild, whilst overgrown roots become woody, hollow, and unpleasantly strong-flavoured. Most varieties are at their best when roots reach 5-7cm diameter for eating fresh.

Storage varieties can grow larger without losing quality, but even these deteriorate if left until they’re massive. I check my crops regularly from about five weeks after sowing, pulling the occasional root to check size. Once they’re ready, harvest promptly or at least within a couple of weeks. The difference between a tennis ball-sized turnip and one the size of a bowling ball is dramatic, and not in a good way.

Expert Tips

Choosing the Right Varieties

Not all turnips are created equal, and matching variety to purpose significantly improves results. For quick salad turnips, ‘Tokyo Cross’ remains hard to beat. These pure white, flattish roots mature incredibly quickly, sometimes in just six weeks, and stay tender even when slightly oversized. I grow these in spring for early harvests.

Traditional varieties like ‘Golden Ball’ produce gorgeous yellow-fleshed roots with a slightly sweeter, nuttier flavour than white types. They’re brilliant for roasting or mashing. ‘Purple Top Milan’ is another favourite, particularly for autumn sowings, with attractive purple-topped roots that store reasonably well.

If you’re interested in turnip tops (the leaves), which are eaten like spring greens in many cuisines, look for varieties specifically bred for leaf production. These put more energy into foliage and less into root development, though honestly, you can harvest young leaves from any turnip without harming root growth too much.

Extending the Season

With careful variety selection and timing, you can harvest fresh turnips from March through November in most of the country. Early sowings under cloches or fleece in February give you March harvests. Make your main spring sowings through March and April for harvests into early summer.

The tricky period is midsummer, when bolting risk is highest. Rather than fighting this, I simply don’t grow turnips from June to August. Instead, I focus on other crops and restart turnip sowings in late July or early August. These autumn crops mature through September and October, often producing the sweetest roots of the year.

In milder areas, particularly the South West or coastal regions, hardy varieties will overwinter in the ground. I mulch plants heavily with straw in late autumn, which provides frost protection and keeps soil workable for winter harvests. In harsher climates, lift roots in November and store them like carrots in boxes of damp sand kept somewhere cool and frost-free.

Maximising Flavour

Several factors influence turnip flavour, and understanding these helps you grow roots worth eating. Consistent moisture throughout growth is crucial. Drought-stressed turnips develop a strong, peppery bite that many people find unpleasant. Keep soil evenly moist, and you’ll harvest mild, sweet roots.

Cold exposure actually improves flavour in mature turnips. Roots touched by light frost convert starches to sugars, developing a noticeably sweeter taste. This is why autumn-harvested turnips often taste better than spring crops. Don’t be afraid to leave autumn turnips in the ground after the first frosts, they’ll be all the better for it.

Harvest size matters enormously. Small turnips, harvested when golf ball to tennis ball-sized, have the finest texture and mildest flavour. As roots grow larger, they become more fibrous and develop stronger brassica flavours. If you prefer subtle-tasting turnips, pull them young rather than waiting for maximum size.

Frequently Asked Questions

When is the best time to plant turnips in the UK?

The best times are early spring (March to April) and late summer (late July to August). Spring sowings give you tender early crops, whilst late summer sowings produce autumn and winter turnips with superior flavour. Avoid sowing during May and June because warm weather and long days trigger bolting, where plants flower prematurely instead of forming decent roots. In milder regions, you can start sowing as early as February under cloches. For continuous supplies, sow small batches every three weeks through the recommended periods rather than one large sowing.

How long do turnips take to grow from seed to harvest?

Quick-maturing varieties reach harvest size in just six to eight weeks under good conditions, making them one of the fastest vegetables you can grow. Traditional varieties typically need 8-10 weeks to develop properly. Growth speed depends heavily on temperature, with warmer spring soil producing faster results than cold early sowings. Autumn crops often take slightly longer as they mature in cooling conditions, but this slower growth actually improves flavour. Rather than counting weeks, check your crop regularly from about five weeks onwards, pulling the occasional root to assess size. Harvest when roots reach 5-7cm diameter for the best eating quality.

Can you grow turnips in pots and containers?

Absolutely, turnips adapt brilliantly to container growing, which actually offers several advantages. Choose pots at least 20cm deep and 30cm wide to accommodate root development. Fill containers with multipurpose compost mixed with a handful of grit for drainage. Container growing solves crop rotation problems and lets you position turnips in optimal light conditions. The main challenge is maintaining consistent moisture because pots dry out faster than garden soil. Check daily during warm weather and water whenever the top 2-3cm feels dry. I grow early spring turnips in pots on my sunny patio, where they’re convenient to harvest and protected from soil pests.

Why are my turnips all leaves and no roots?

Several factors cause this frustrating problem. Excessive nitrogen from overfertilising or very rich soil pushes growth into foliage at the expense of roots. Overcrowding produces similar results because plants compete for resources and cannot develop proper roots. Hot weather or late spring sowings trigger bolting, where plants focus on flowering rather than root development. Finally, some pest damage, particularly from cabbage root fly larvae feeding on developing roots, stops root formation entirely. The solution depends on the cause, but generally ensure proper spacing, avoid overfeeding, sow at appropriate times, and protect against pests with mesh or collars around plant stems.

Do turnips need full sun to grow properly?

Turnips are reasonably flexible about light conditions, though they perform best with at least four to six hours of direct sunlight daily. I’ve successfully grown decent crops in partial shade, particularly summer sowings that actually benefit from afternoon shade during hot spells. Full shade produces weak, leggy plants with poor root development. If your garden has limited sunny spots, prioritise those for sun-loving crops like tomatoes and peppers, and tuck turnips into areas receiving morning sun and afternoon shade. Autumn crops tolerate lower light levels better than spring sowings because they’re naturally growing during shortening days anyway.

How do you prevent turnips from going woody and bitter?

Consistent watering is absolutely key to tender, mild-flavoured turnips. Irregular moisture, particularly drought followed by heavy watering, causes roots to become woody and develop a hot, bitter taste. Water deeply during dry spells to maintain even soil moisture throughout growth. Harvest timing is equally important, pull roots when they reach 5-7cm diameter rather than leaving them to grow enormous. Oversized turnips inevitably turn woody and strong-flavoured. Hot weather during growth also produces bitter roots, which is why spring and autumn crops taste better than anything grown through summer. Finally, choosing mild-flavoured varieties like ‘Tokyo Cross’ gives you naturally sweeter results than some traditional types.

Conclusion

Growing turnips successfully comes down to understanding their preferences and working with their natural growing rhythm. These cool-season brassicas reward you with quick results when sown at the right times, maintained with consistent moisture, and harvested whilst still young and tender. I’ve found them to be amongst the most reliable vegetables in my rotation, rarely suffering serious problems and producing decent crops even in challenging seasons.

The beauty of turnips lies in their versatility and speed. Whether you’re growing baby salad roots or larger storage varieties, you’ll appreciate vegetables ready to harvest in weeks rather than months. They fit brilliantly into crop rotation plans, filling gaps between slower-growing crops or following early potatoes on newly cleared ground.

Start with spring sowings of a quick variety like ‘Tokyo Cross’ to build your confidence. Once you’ve experienced the satisfaction of pulling sweet, tender turnips from your own garden, you’ll understand why these humble roots deserve more attention. Follow the guidance above, pay attention to timing and watering, and you’ll soon be harvesting turnips that might just change your mind about this often-maligned vegetable.

Author: Megan Walker

Megan focuses on seasonal food, kitchen garden growing, and how households can reconnect with where their food comes from. Her writing blends practical growing advice with ideas for cooking and eating in season. With a passion for fresh ingredients and sustainable living, Megan’s articles help readers make the most of local produce while supporting British farms.