Oregano is a compact perennial hydroponic herb for free-draining drip or ebb-and-flow systems, producing the best flavor under bright light, moderate feeding.
Varieties
Variety
Latin Name
Greek oregano
Origanum vulgare subsp. hirtum
Italian oregano
Origanum × majoricum
Common oregano
Origanum vulgare
Golden oregano
Origanum vulgare 'Aureum'
Syrian oregano
Origanum syriacum
Lookalikes
Lookalike
Latin Name
Description
Sweet marjoram
Origanum majorana
Closely related herb with milder, sweeter aroma and similar leaves.
Thyme
Thymus vulgaris
Another small-leaved Mediterranean herb with woody stems, but leaves are much smaller.
Mint
Mentha spp.
Also in the mint family with opposite leaves and square stems, but scent is cooling and minty.
Edible Parts
Part
Use
Description
Toxicity
Leaves
Primary edible culinary herb used fresh or dried.
Harvest leaves and shoot tips before flowering for best flavor.
Generally edible in normal culinary amounts; concentrated oregano oil should be used cautiously.
Tender stems
Flavoring herb with leaves, especially when fresh.
Young stems can be chopped with leaves; older woody stems are usually discarded.
Generally edible in normal culinary amounts.
Propagation
Part
Method
Description
Stem cuttings
Rooting cuttings in water or moist media
Take non-flowering stem cuttings and root in clean water or moist substrate.
Seed
Shallow sowing in starter plugs
Sow tiny seeds shallowly on moist media and provide light and warmth.
Growing Parameters
Parameter
Range
Optimal
Unit
pH
6.0 - 7.5
6.2 - 6.8
pH
Electrical conductivity
1.0 - 2.2
1.4 - 1.8
mS/cm
Air temperature
15 - 30
20 - 26
°C
Daily light integral
12 - 24
16 - 20
mol/m²/day
Cultivation
Aspect
Compatibility
Notes
Drip irrigation with inert media
High
Well suited in free-draining substrates; avoid overwatering.
Ebb and flow
High
Works well if flood cycles allow the root zone to drain and re-oxygenate.
Nutrient film technique
Medium
Can work for compact plants, but oregano prefers excellent drainage.
Identification
Growth habit: Aromatic perennial herb with low, spreading to upright woody stems and dense branching growth.
Leaves: Small opposite oval leaves are green to gray-green, slightly hairy, and strongly aromatic when rubbed.
Stems: Young stems are tender and square; older stems may become woody near the base.
Flowers: Small white, pink, or purple tubular flowers form in clusters at stem tips when plants mature.