Marjoram is a warm climate herb. It might survive in zone 7 temps, but it won't do well. It can survive brief cold spells, but not extended freezes. I grow it in a big container, and haul it inside when it gets cold. And it doesn't get very cold around here.

Indeed, the info on the web isn't very consistent.

I've had one in a large terra cotta pot for so many years now, I lost count. It looks like a bonsai with a woody trunk. It does have a lovely fragrance and I use it a lot. Mine stays outdoors here in FL, but since it's in a pot, it could be moved out of too-cold weather, as mentioned.

I tried growing it in 7A, and it didn't survive the winter, even though the weather was mild.

It hates waterlogged, cold soil. It's very popular in Central European cooking, but grown as an annual and dried. I actually think it's more aromatic when dry.

Thank you so much everyone, thank you. I guess no point trying to grow it outside.

At the moment I have the herb called 'Italian Oregano' Origanum majoricum. Although, the plant I bought just said 'Italian Oregano' and did not have the Latin name on the label. This herb looks, smells and tastes distinct from the Greek Oregano plant I have. I dont have any marjoram growing now side by side and cannot compare the two directly, Do you think Italian Oregano is kind of like marjoram? Could I substitute in a pinch? Thanks again.

Origanum majoricum IS marjorum! Italian (or Greek) oregano are generally grouped as Mediterranean oregano and are selections of Origanum vulgare, with only a varietal difference to distinguish between the two. Marjorum is a completely separate species.

I grow marjoram in a container outdoors and so far it has returned each of the 3 years I have had it. But my climate in winter is pretty different from that of a zone 7 or lower :-)

Origanum x marjoricum, aka Italian Marjorum, is a hybrid and not the same as Origanum majorana, Sweet Marjorum. OP says they have Origanum marjoricum, presumably a mislabelling of the hybrid, Italian Marjorum, not Italian Oregano.

@floral_uk z.8/9 SW UK thank you for the link. that really is a great website.

@floral_uk z.8/9 SW UK looking at the pictures I think over here in the US of A people call Italian Oregano what you are referring to as Italian Marjoram both AKA Origanum x marjoricum. At least it seems to me.