Quick answer

Plant tulip bulbs in the UK in November, later than every other spring bulb. The signal that overrides the calendar is the soil itself: wait until it feels properly cold at spade depth, usually a week or two after the first frost has blackened the summer bedding. Bulbs put in during December still flower.

The short answer to when to plant tulip bulbs in the UK is November, which puts them out of step with every other spring bulb on the shelf. The reason is disease rather than tradition: cold soil suppresses the fungus behind tulip fire, so the bulb that goes in last tends to do best. Below are the checks to run in your own garden, the job for each month, and how late you can leave it.

Table of contents

The signals that say the soil is ready

A date gets you close. What settles it is the ground itself, and the four checks below take a couple of minutes with a trowel and your bare hands.

Soil that has gone cold at spade depth

Push a spade or long trowel in to about 15cm and hold the back of your hand against the soil at the bottom of the hole. The surface cools weeks before the layer a bulb actually sits in, so the reading that matters is down there.

If it feels neutral, close to your own skin temperature, the ground is still holding summer warmth. When it makes your knuckles ache within a few seconds you are in the right zone, roughly where a soil thermometer would read 10C. If you cannot decide, compare two spots: soil under a south-facing wall stays warm for weeks longer than an open north-facing border, so plant the warm corners last.

Frost on the summer bedding

The first air frost is the cue most UK gardeners work to. Dahlia foliage turns black overnight, begonias collapse, nasturtiums go to mush, and the beds clear themselves. That frost arrives within a fortnight or so of the soil dropping to planting temperature, which is why the two signals agree. Leaf fall says the same thing from higher up: once the horse chestnuts and limes near you are bare, the ground beneath them has cooled with them.

In mild coastal and city gardens frost may not turn up before Christmas, so fall back on the spade test and the calendar: once November is halfway through, plant anyway.

A test dig that decides border or pot

Tulips rot in wet ground far more readily than daffodils do. Dig a hole roughly a spade deep where you plan to plant, fill it with water, and come back two hours later.

If it has drained, plant there. If water is still standing, the spot will stay saturated all winter and the bulbs will turn to mush: use containers, or dig a barrowload of horticultural grit through the top 20cm and plant on a slight mound.

The bulbs in your hand

Roll each bulb between finger and thumb and press gently. A good one is firm and heavy for its size, like a small onion, and anything soft, spongy or hollow-feeling will not recover.

A missing papery skin is cosmetic, and light surface mould brushes off with a dry cloth. Fluffy white growth, sunken brown patches or a sour smell mean the bin rather than the compost heap. A bulb already pushing a pale shoot should go in first.

Which type you have changes the display, not the date

Every group goes in at the same point in autumn. What changes is when they flower and whether you see them again in year two.

Species and botanical tulips such as Tulipa sylvestris and T. clusiana are the small, early ones, often out in March, and the most reliably perennial group: they settle into gravel and sunny borders and return for years.

Single early and double early types open in early to mid April on short stems that suit an exposed garden. Triumph and Darwin hybrid tulips carry the display from mid to late April, and Darwin hybrids are the group most often recommended for leaving in the ground. If you are buying only one group, make it those.

Single late, lily-flowered, fringed, parrot and double late tulips finish through May. They are the showiest and the least dependable in year two, which is why many gardeners buy them fresh each autumn.

One group from each band gives around ten weeks of flower from a single afternoon of work.

Month by month, from now until midwinter

Cornwall and Aberdeen sit two to three weeks apart, and any two seasons differ by a fortnight, so the adjustment rule matters more than the month: cold northern and inland gardens reach planting conditions first, mild south-western and city gardens last.

Late August

Nothing goes in the ground yet. This is the buying month, while stock is complete and the unusual varieties are still on the shelf. Store bulbs cool, dark and airy, in a paper bag rather than sealed plastic, and away from ripening fruit.

September

Still not tulips, even though the bulb displays are at their biggest. Daffodils, crocus, alliums and hyacinths all want planting now, while the soil is warm enough for them to root. Use the month for groundwork: clear the beds and run the drainage test while digging is easy.

October

The waiting month across most of the country, and the earliest sensible planting month in the coldest gardens. In the north of England, in Scotland or on exposed high ground, late October is fine once the first frost has been through. Everywhere else, keep checking with the back of your hand.

November

The main event, and the month mainstream UK guidance points to. Soil is cold, tulip fire spores are far less active, and there is ample time for roots before the hard weather. Aim for the first three weeks, though a bulb planted on the last day of the month is not late.

December and January

Later than ideal and still well worth doing. December plantings generally flower, sometimes a week or two behind and on shorter stems, and gardeners are still planting in January when the weather allows. Two things stop you: frozen ground and a sodden bed. If the fork will not go in, plant into pots of gritty compost and stand them somewhere sheltered.

Planting, step by step

Pick a dry day when the soil crumbles rather than smears. Cold is fine, wet is the problem, and there is no need to water anything in.

1. Clear and loosen the ground

Clear the last of the summer bedding and any weeds, then fork the top 20cm over so bulbs sit in loose soil, working grit into each hole on heavy clay. Tulips want full sun and shelter: shade gives long stems that go over in the first storm.

2. Get the depth right

Bulbs go in at two to three times their own height: roughly 15cm of soil above the nose, and nearer 20cm if you want them back in future years. Shallow planting is the most common reason tulips flop or come up blind.

Set the flat base down and the pointed nose up, on firm soil rather than an air pocket. If you are putting in dozens along a border edge or working heavy clay, a long-handled bulb planter takes a consistent plug at the depth you set and saves a lot of stooping; a trowel is fine for a pot or two.

3. Space them for the effect you want

Allow 7 to 10cm between bulbs in a border, in blocks of at least seven of one variety rather than a line. In pots go almost shoulder to shoulder, provided the bulbs touch neither each other nor the sides. Either way it is a long stretch at ground level, and a padded garden kneeler with handles is often the difference between finishing the border and stopping halfway.

4. Plant containers in gritty compost

Mix about a third grit or perlite through a peat-free multi-purpose compost, since bulbs left in soggy compost rot as readily as in a wet border. A bag of general-purpose compost plus a couple of handfuls of grit covers a large container. Stand the pot on feet, away from downpipes.

5. Backfill, firm and label

Firm the soil back with the flat of your hand rather than treading it, and skip the watering can unless the ground is unusually dry. Push a label in or photograph the spot: the quickest way to lose a hundred tulips is to plant something else on top of them.

6. Keep squirrels and mice off

Freshly dug soil advertises itself. If you have lost bulbs before, peg chicken wire over the bed until the surface settles, then lift it before the shoots appear. In a container, mesh under a centimetre of compost does the same job.

What goes wrong, and how to recover

Five failures account for most disappointing tulip springs, and most of them are settled before the bulb goes in.

Bulbs that rot before they start

Nothing comes up, and a test dig turns up a soft brown mess. The cause is nearly always standing water. A rotted bulb cannot be saved, so fill the space in spring and move next autumn's tulips into pots or a gritted raised bed.

Tulip fire

Twisted, scorched leaves with brown spots, shoots that fail to open, grey fuzz in damp weather. Lift affected plants whole, bulb and all, into household waste rather than the compost heap. The usual advice is to keep tulips out of that ground for at least three years and to plant later next autumn, because cold soil is the main defence.

Leaves but no flower

A blind bulb usually traces back to shallow planting, to small bulbs sold as one-season bedding, or to foliage cut down last spring before it had fed the bulb. Feed after flowering, leave the leaves six weeks until they yellow, then lift and replant deeper in autumn.

Bulbs that go mouldy in storage

A bag sweating on a warm windowsill, white fluff spreading between the bulbs, is a September problem rather than a spring one. Tip it out, discard anything soft, and spread the rest on a tray somewhere cool and airy.

Frost on shoots and containers

Emerging foliage is hardy and a February frost on it does no lasting damage, so resist the urge to fleece the border; open flowers are the vulnerable stage. Containers are the real risk, since the compost freezes from all sides at once: group pots against a wall in the coldest spells.

Frequently asked questions

Is it too late to plant tulip bulbs in December?

No. December planting is later than ideal, but tulips put in then usually still flower, often a week or two behind and on shorter stems. The only real blocks are frozen ground and waterlogged soil, both solved by planting into pots of gritty compost instead.

Can you plant tulip bulbs in September in the UK?

You can, but tulips are the one bulb worth holding back. Warm September soil raises the risk of tulip fire, and an early start buys nothing in flowering time. Plant daffodils, crocus and alliums now, and leave the tulips in their bag.

How deep should tulip bulbs go?

Two to three times the height of the bulb, which works out at roughly 15cm of soil above the nose for a standard tulip. Go nearer 20cm if you want them back in later years, or if squirrels have dug your bulbs up before.

Do tulips come back every year in the UK?

Some do reliably, many do not. Species tulips and Darwin hybrids are the most likely to flower again, while parrot, fringed and double late types often give one strong year and then dwindle. Gardeners disagree on the fix: some plant deep and leave them, others lift and dry the bulbs each summer.

How long do tulips take to come up after planting?

Expect the first leaves roughly 10 to 16 weeks after planting, and flowers from March to May depending on the group. A November planting usually shows its noses in February, which is normal: emerging foliage is hardy and a frost on it does no lasting harm.