Growing Hydroponic Marjoram


Marjoram is native to the Mediterranean, North Africa and Western Asia.  For the Romans, marjoram was a symbol of happiness, grown by Aphrodite herself.  It is often referred to as ‘sweet marjoram’ vs it’s close cousin oregano, which is sometimes called ‘wild marjoram’

Marjoram and oregano are closely related, however marjoram has a more understated aroma with a sweet, floral and earthy taste with just a bit of spice.  Oregano, on the other hand, has a savory, spicier and more pungent aroma.  While marjoram is a less popular that wasn’t not used widely in the United Stages until after WWII, it’s unique flavor makes it preferred in various seasoning blends, and a unique addition to poultry and fish dishes.  It’s also a wonderful addition to various sauces, salad dressings and homemade teas.

Marjoram looks very similar to oregano.  Marjoram leaves tend to look a bit more like mint, of which both marjoram and oregano are closely related.  Marjoram’s leaves are just a bit longer, with a more oval shape than those of oregano.  But the easiest way to tell the difference is by the aroma.

Hydroponic Marjoram
Germination Light EC Range pH Range: Time to Harvest
Intermediate 14-16 hours 1.6-2.3 6.0-7.0 6-8 weeks
Nutrient and Health Info - Used by woman to regulate hormone levels associated with irregular menstrual cycles and polycystic ovary syndrome (PCOS). Not recommended for pregnant or breastfeeding woman due to its impact on hormones.
Tips & Tricks - Make sure to always leave at least 3" of branch at the base of your marjoram plant when pruning and harvesting.




Marjoram can be stubborn when it’s time for germination.  Give marjoram 2-3 weeks to germinate.  If you’d like to speed things up, and ensure more of your plants propagate, consider using our Seedling Starter Kit or the paper towel method.


Marjoram prefers lots of sun, so to ensure it grows most successfully, place it in an area of your indoor hydroponic garden that will receive lots of light for 14-16 hours a day.

EC Range:

Marjoram grows best with an EC range between 1.6 – 2.3. It will grow best with oregano, lettuce, parsley, spinach and other herbs and leafy greens.

pH Range:

Keeping your pH between 6.0 – 7.0 will ensure your marjoram is happy, healthy, and gets along with other plants well.


Our Green Machine nutrients are all you’ll ever need to grow marjoram successfully.

Time to Harvest:

Marjoram, like its close cousin oregano, can be a slower grower than many other herbs.  However, you should be able to begin harvesting marjoram in about 6-8 weeks.

Pruning and Harvesting:

Harvest your marjoram by cutting branches off while leaving at least 3” at the base.  This will allow your marjoram to continue growing successfully.  Of course, you can simply pick individual leaves off the marjoram branches, rather than cutting a section of the branch off.


Marjoram’s sweet, floral and earthy taste make it a unique herb to use in a variety of seasonings, sauces, salad dressings, and seafood and poultry meals.  If you love growing your own herbs, you won’t want to miss out on this unique flavor.

Check Out Our Marjoram Recipes!

Let’s grow together!