What's the difference between sweet marjoram and oregano?

Same genus, different species, different flavour. Sweet marjoram (Origanum majorana): tender perennial (H1c–H3), small grey-green leaves, sweet delicate flavour with floral notes — the classic French and Italian herb for lamb, omelettes, sauces. Oregano (O. vulgare): hardy perennial (H4–H5), broader green leaves, stronger more peppery flavour — the pizza herb. Pot marjoram (O. onites): intermediate. Sweet marjoram is grown as an annual in most of the UK because it doesn't survive winter outdoors; oregano is fully hardy.

Will sweet marjoram survive a UK winter?

Mostly no — it dies in a UK winter outdoors except in the mildest gardens. Sweet marjoram is tender (RHS H1c–H3) and hates cold wet winters. Three options. (1) Grow as an annual — sow or buy fresh each May, accept it dies at the first frost. (2) Grow in a pot that moves indoors for winter (porch, conservatory, kitchen) — survives as a perennial. (3) Take cuttings in August as insurance — root indoors over winter, plant out next May.

When and how do I pick sweet marjoram?

From late June through to first frost. Snip 10 cm tips of young shoots with scissors — the plant branches and re-grows. Strongest flavour is on tender new growth before flowering (typically June). Pinch out flower buds as they form to keep the plant producing tender leaves through summer. Use fresh — sweet marjoram doesn't dry as well as oregano (volatile oils fade quickly). For winter use: chop and freeze fresh leaves in ice cubes with olive oil.

Can I grow sweet marjoram from a supermarket pot?

Possible but disappointing. Supermarket herb pots are typically overcrowded clumps of weak seedlings grown for fast leaf production, not long life. Two approaches if you want to try: (1) Split the supermarket pot into 3–4 smaller clumps, pot each into fresh compost — at least one usually survives and bulks up over a few months. (2) Take small cuttings from the supermarket plant and root them in compost — keeps the variety going. For a real sweet marjoram, buy a named plant from a herb nursery.

Why is my sweet marjoram bland?

Three usual causes. (1) Too rich soil or too much feeding: like other Mediterranean herbs, sweet marjoram concentrates essential oils under stress. Stop feeding, add grit to the soil. (2) Not enough sun: needs 6+ hours direct sun for full flavour. (3) Wrong species: pot marjoram and supermarket marjoram labels are often weak. Buy true Origanum majorana from a reputable herb supplier to be sure.

Is knotted marjoram the same as sweet marjoram?

Yes — same plant, different name. Knotted marjoram refers to the small tight knot-like flower buds that form before opening — a distinctive visual feature of Origanum majorana. The two names are completely interchangeable in UK gardening and herb literature. The Latin name majorana (= majoram in Old English/French) gives the modern English form.

Majeranek ogrodowy

Origanum majorana

Sow sweet marjoram indoors in March or buy young plants in May, in full sun in well-drained soil — it's a tender Mediterranean perennial that's nearly always grown as a half-hardy annual in the UK because it doesn't survive cold wet winters. Sweet marjoram is more tender than its cousin oregano (RHS H1c–H3) and dies in a UK winter outdoors except in the mildest gardens or under cover. The sweeter, more delicate flavour (vs the punchy oregano) makes it the classic French and Italian herb for lamb, omelettes, and tomato dishes — fresh is unmatched. Pinch out flowering buds to keep the bush producing tender leaves. Grow in a pot that moves indoors over winter for a perennial supply, or sow fresh each spring as an annual. Knotted marjoram is the same plant (named for the knot-like flower buds).

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