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How to Grow Peanuts UK | Regional Planting Calendar
Move through the SoilCommander growing library like a course: keep the navigation in place, open the next lesson, and build your garden plan step by step.
In the UK, peanuts go in the ground early April to early June, and are ready to harvest 90–150 days after planting.
Peanuts (Arachis hypogaea) — annual.
Timing is the decision that matters most in the UK: there are 4 separate regional sowing windows, ranging from early April in Southern England to early April in Scotland.
Core growing advice on this page is checked against named horticultural and university-extension sources — see References.
RHS/GrowVeg: start seed indoors in spring and move on once the soil has warmed in early summer. A single window is applied uniformly across all four sub-regions because the RHS is explicit that peanut requires a long hot growing season and is generally not suited to outdoor cropping anywhere in most of the UK -- it is a greenhouse crop throughout, so no regional outdoor gradient applies.
Midlands - detail & sources
RHS/GrowVeg: start seed indoors in spring and move on once the soil has warmed in early summer. A single window is applied uniformly across all four sub-regions because the RHS is explicit that peanut requires a long hot growing season and is generally not suited to outdoor cropping anywhere in most of the UK -- it is a greenhouse crop throughout, so no regional outdoor gradient applies.
Northern England - detail & sources
RHS/GrowVeg: start seed indoors in spring and move on once the soil has warmed in early summer. A single window is applied uniformly across all four sub-regions because the RHS is explicit that peanut requires a long hot growing season and is generally not suited to outdoor cropping anywhere in most of the UK -- it is a greenhouse crop throughout, so no regional outdoor gradient applies.
Scotland - detail & sources
RHS/GrowVeg: start seed indoors in spring and move on once the soil has warmed in early summer. A single window is applied uniformly across all four sub-regions because the RHS is explicit that peanut requires a long hot growing season and is generally not suited to outdoor cropping anywhere in most of the UK -- it is a greenhouse crop throughout, so no regional outdoor gradient applies.
Start seed indoors in spring in light, free-draining compost; peanut is frost-tender (H2) and cannot survive freezing (RHS, GrowVeg).
Planting out and establishment
1
Move on under glass, or outdoors into a warmed mound in early summer, spaced about 30cm each way or 25cm apart in rows 35cm apart; full sun and a sheltered spot (RHS, GrowVeg).
Flowering and pegging
6
Small yellow flowers veined with orange appear mid- to late summer; after pollination the flower stem elongates and pushes the ovary underground, where the pod develops (RHS).
Pod fill and harvest
8
Needs at least 120 days of hot weather to crop well. Yellowing foliage signals harvest: lift the whole plant and leave it to dry on the soil surface with pods attached for several days (GrowVeg).
When to pick: Clemson: green/boiling peanuts "typically mature from 90 to 110 days after planting"; dry/roasting peanuts "130 to 150 days after planting". For boiling peanuts, "pods that are not filled by the kernel are too young; pods with a dark internal hull color are overmature". For roasting peanuts, ready "when at least 65 percent of the pods have turned dark inside the hull and the seed coats are pink to copper-red in color".
Storage
Dried pods store long-term; green/boiling type used fresh
Tobacco thrips (Frankliniella fusca) is the primary vector of Tomato Spotted Wilt Orthotospovirus in Southeastern US peanuts, also causing direct feeding injury.
Lesser cornstalk borer
Elasmopalpus lignosellus
UGA Extension: lesser cornstalk borer chews on pods, contaminating crop with aflatoxin-producing Aspergillus; thrives in hot, dry conditions.
8 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.
Frequently Asked Questions
When should I sow peanuts in the UK?
In Southern England, from early April. In Scotland, wait until early April. Treat these as a guide rather than a fixed date — the governing rule is to sow only once frost risk has passed and temperatures are reliably warm enough.
When do I sow peanuts?
Sow early April to early June, at around 20°C for germination.
How long do peanuts take to grow?
Typically 90–150 days, depending on cultivar and growing conditions.
What soil pH do peanuts need?
A pH of about 5.8–6.5. That span reflects genuine variation between the authorities we cite rather than a single agreed figure — the References section lists each source's exact range.
What problems affect peanuts?
Our data links 2 diseases and 2 pests to this crop. See the sections above for each one and how to manage it.
Plan next season before the problems start
Most of the advice on this page comes down to timing and spacing — sowing at the right moment, rotating beds, and giving plants enough airflow. The UK Garden Planner lays your plot out month by month so those decisions are already made before the season starts.
UK vegetable growing guides · Checked against RHS & Met Office guidance
Every SoilCommander guide is written and maintained by our editorial team for real UK growing conditions, and reviewed against Royal Horticultural Society growing advice and Met Office climate data before publication.
Sketch your exact plot shape, pick your UK crops, and get a spacing-accurate bed layout with companion pairings, a rotation plan and month-by-month sowing dates — every fact sourced from RHS and Garden Organic.
