When to Harvest Early Potatoes in the UK

Q: Do I need to wait for the flowers before harvesting potatoes?

Flowering is a reliable sign earlies are worth checking, but it isn't an exact deadline. Some varieties flower lightly or not at all. If in doubt, do a test dig at the edge of the row rather than waiting on the flowers alone.

Q: Can I leave early potatoes in the ground longer to get bigger?

A little, but earlies are bred for flavour and quick cropping, not size or storage. Left too long they lose their characteristic thin skin and sweetness, and become more exposed to slug damage and blight risk later in the season.

The key sign: flowering

Once an early potato plant flowers, the tubers beneath it are usually ready to lift, or very close to it. Flowering signals the plant has put on most of the growth it's going to, and the tubers underneath have reached a worthwhile size for an early crop.

It's a reliable cue, not a strict rule. Some varieties flower lightly, briefly, or barely at all even when the tubers underneath are perfectly ready. If your plants haven't flowered but it's been ten weeks or more since planting, it's still worth checking.

Timing by planting date

Type	Typically planted	Ready to harvest	Weeks from planting
First earlies	Mid March	Mid June – early July	10–12 weeks
Second earlies	Late March / April	Late June – July	13–15 weeks
Main crop (for comparison)	April	August – October	15–20 weeks

Dates shift earlier in the South West and later in Scotland and the north, so count weeks from your actual planting date rather than relying on the calendar alone.

The test-dig method

The most reliable way to know for certain: gently scrape back the soil at the edge of one plant, ideally one that looks a bit smaller or less vigorous than the rest, so you're not sacrificing your best plant to find out. Feel around for a few tubers without lifting the whole plant.

What you're looking for

Egg-to-fist sized tubers with skin that's set, not papery-thin and rubbing off at a touch. If the skin rubs off easily, give it another week or two. If you find a good handful at a reasonable size, the rest of the row is ready.

Why timing matters more for earlies than main crop

Earlies aren't bred for storage or maximum yield; they're bred for flavour and a quick turnaround. That changes the calculation on when to lift them. Leave them too long and you don't gain much; you lose the thin, delicate skin that makes new potatoes worth growing in the first place, and you extend their time in the ground exposed to slugs and, later in the season, blight risk.

Lift them as you need them rather than all at once if you can: earlies don't store well long-term, and the difference in flavour between a potato eaten the same day and one left in a bag for a week is genuinely noticeable.

What RHS and Garden Organic say

RHS gives June to July for first earlies and July to August for second earlies, harvested when the flowers open or the buds drop, with tubers about the size of hens' eggs. In a container, tip the contents out and pick the potatoes by hand. Earlies are best used as soon as possible after lifting.

Where the sources differ
Question	RHS	Garden Organic
The flowering sign	Harvest earlies when the flowers are open or the buds drop.	Not all varieties produce flowers; dig down carefully beside a plant with a trowel to check.
How long after planting	No figure; harvest times vary across the UK and with the weather.	Around nine to ten weeks after planting, from June to July.

Sources: RHS, Potatoes: grow your own; Garden Organic, Potatoes. Read 19 September 2026.

Frequently asked questions

When are early potatoes ready to harvest in the UK?

First earlies are usually ready 10–12 weeks after planting, once the plants flower, typically June. Second earlies take a little longer, around 13–15 weeks, ready from late June into July.

Do I need to wait for the flowers before harvesting?

Flowering is a reliable cue but not an exact deadline: some varieties flower lightly or not at all. If in doubt, do a test dig at the edge of the row rather than relying on flowers alone.

Can I leave early potatoes in the ground longer to get bigger?

A little, but earlies are bred for flavour and speed, not size or storage. Left too long they lose their thin skin and sweetness, and face more slug and blight risk.

Know exactly when your potatoes are ready

Vercro keeps each planting's date and stage, and when a crop is likely ready it shows it on Today to check, so you are not counting weeks on a calendar.

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