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How to Grow Marjorams UK | Regional Planting Calendar
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RHS states plants go outdoors in late spring or summer after hardening off; NC State sows indoors 6-8 weeks before last frost, giving a spring propagation window overall.
Midlands - detail & sources
RHS states plants go outdoors in late spring or summer after hardening off; NC State sows indoors 6-8 weeks before last frost, giving a spring propagation window overall.
Northern England - detail & sources
Same spring propagation window as elsewhere in the UK. A real caution kept honest: this is a tender perennial, not fully hardy (RHS), needing to be brought indoors over winter everywhere in the UK -- further north makes no material difference since it is never left outdoors year-round regardless.
Scotland - detail & sources
Same spring propagation window as elsewhere in the UK. A real caution kept honest: this is a tender perennial, not fully hardy (RHS), needing to be brought indoors over winter everywhere in the UK -- further north makes no material difference since it is never left outdoors year-round regardless.
Free-draining/well-drained; poor drainage causes root rot -- use a container or raised bed on waterlogged soil (RHS). NC State: loamy sand or sandy loam preferred, average dry-to-medium moisture, rots in saturated conditions.
Lifecycle
Tender perennial sub-shrub, usually grown as an annual in cooler climates. NC State places it firmly in USDA zone 9 and warmer, noting that further north it "usually do not overwinter well"; RHS agrees it "isn't considered fully hardy" and should be brought indoors over winter -- onto a sunny windowsill, in a conservatory, or a frost-free greenhouse.
NC State: sow seed indoors 6-8 weeks before the last spring frost, or direct-sow about 2 weeks before the last frost. Division and leaf cuttings also work (NC State); RHS gives layering and softwood cuttings as further methods.
Planting out
0
RHS: plant out late spring or summer after hardening off; container at least 15cm (6in) wide and deep for one plant, spaced at least 20cm (8in) apart; peat-free soil-based compost mixed with up to 25% horticultural grit.
Growth and cutting back
3
NC State: cut back stems before flowers appear to encourage bushy growth. Full sun, 6+ hours direct sunlight daily (NC State).
Harvest and overwintering
8
RHS: harvest before flowers open, spring through early autumn, by snipping shoots and stripping the leaves. Not fully hardy -- bring indoors over winter (sunny windowsill, conservatory, or frost-free greenhouse); NC State agrees it usually does not overwinter well north of USDA zone 9 and is typically grown as an annual there.
When to pick: RHS: harvest before flowers open for the best flavour, snipping a few shoots then stripping off the leaves, from spring through early autumn. NC State: collect leaves before flowering; cut back stems before flowers appear to encourage bushy growth.
Storage
RHS: used fresh in cooking, salads, oils, vinegars or tea.
RHS names "sage and Ligurian leafhoppers, cause pale mottling" -- recorded against the existing sage leafhopper entry. NC State reports no serious insect problems, a genuine regional contrast kept honest.
Light: full sun, 6+ hours direct sun daily. Soil: loamy sand or sandy loam preferred; pH neutral (6.0-8.0) to alkaline (>8.0); well-drained, average dry-to-medium moisture; rots in saturated conditions. Size: 1-2ft height and width, needs 12in-3ft of space. Hardiness: tender perennial, thrives USDA zone 9a-10b; north of zone 9 usually grown as an annual, does not overwinter well. Propagation: seed indoors 6-8 weeks before last spring frost, or direct-sown about 2 weeks before last frost; also division and leaf cuttings. Pests/diseases: no serious insect or disease problems when conditions are met. Harvest: collect leaves before flowering for best flavour; cut back stems before flowers appear to encourage bushy growth.
Site: warm, sunny spot, free-draining soil; poor drainage causes root rot -- grow in a container or raised bed on waterlogged soil. Planting: container at least 15cm (6in) wide and deep for one plant, spaced at least 20cm (8in) apart; plant out late spring or summer after hardening off; soil mix of peat-free soil-based compost with up to 25% horticultural grit. Harvest: before flowers open for best flavour, snip a few shoots then strip the leaves, spring through early autumn; used fresh in cooking, salads, oils, vinegars, tea. Overwintering: not fully hardy -- bring indoors over winter (sunny windowsill, conservatory, or frost-free greenhouse). Pests/diseases: mint rust, mint moth caterpillars, sage and Ligurian leafhoppers (cause pale mottling). Propagation: layering spring/autumn, division spring or after flowering, softwood cuttings from summer growth.
2 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 marjorams in the UK?
In Southern England, from early March. In Scotland, wait until early March. 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 marjorams?
Sow early March to mid April.
What soil pH do marjorams need?
A pH of about 6–8. 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 marjorams?
Our data links 1 disease 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.
