Oregano, or marjoram, is a perennial herb that is often grown in greenhouses to get fresh greens all year round. It is widely used in cooking and medicine due to its spicy aroma and beneficial properties. However, to successfully grow oregano in a greenhouse, it is necessary to take into account the characteristics of the soil, temperature, humidity and care. How to choose the best varieties, when to plant seedlings and what conditions will ensure the maximum harvest? Let's look at all the nuances in detail.

Choosing an Oregano Variety for Greenhouse Growing

The choice of variety depends on the purpose for which oregano is grown - for fresh leaves, oil or drying.

The best varieties of oregano for greenhouses:

• Origanum vulgare is the most common species, resistant to various conditions.
• Greek oregano – has a stronger aroma and a higher content of essential oils.
• Cretan oregano – has a milder taste and is suitable for salads and fresh consumption.
• Italian oregano is popular among cooks due to its rich flavor and dense foliage.
• Golden Oregano is an ornamental variety with yellow-green leaves, suitable for growing in containers.

How to choose the right variety?

• If you plan to grow it year-round, choose varieties with high tolerance to low light levels.
• For an intense scent, choose types with a high essential oil content.
• If oregano is grown for ornamental purposes, look for variegated varieties.

Expert tip: For maximum flavor, combine several varieties with different characteristics - this will give you a harvest with different shades of taste and aroma.

Preparing the soil and planting oregano in a greenhouse

Oregano requires light, loose and well-drained soil. Avoid acidic soils and heavy clay substrates.

Soil requirements:

• Acidity: pH 6.0-7.5. If necessary, use dolomite flour or lime for deoxidation.
• Structure: Lightweight, breathable and permeable. Add sand, vermiculite or perlite to improve drainage.
• Organic fertilizers: Before planting, add humus (4-5 kg/m²) and compost.
• Mineral fertilizers: Phosphorus-potassium fertilizers (20-30 g/m²) promote active growth of greenery.

Planting scheme:

• Distance between plants: 20-30 cm for compact varieties, 40-50 cm for tall ones.
• Planting depth: Seeds are planted at a depth of 0.5-1 cm, seedlings are planted at a depth of 5-7 cm.
• Mulching: Using fine wood chips or agrofibre helps retain moisture and suppress weed growth.

Expert tip: Oregano grows best with a combination of organic and mineral fertilizers, so prepare the soil in advance by enriching it with nutrients.

Optimal conditions for growing oregano in a greenhouse

What parameters are necessary for successful growth?

• Temperature:
  • Optimum range: +18…+24°C.
  • Minimum temperature for growth: +10°C.
  • In winter, it is advisable to maintain the temperature at least +12°C.
• Lighting:
  • Active growth requires 10-12 hours of light per day.
  • In winter, additional lighting with phytolamps is recommended.
• Humidity:
  • Optimal level 50-60%.
  • Excessive moisture leads to root rot and fungal diseases.
• Ventilation:
  • Regular ventilation helps prevent stagnant air and the formation of mold.

Expert advice: If there is insufficient lighting, install LED lamps with a red-blue spectrum - they stimulate the growth of greenery and make the plant thicker.

Watering and fertilizing oregano in a greenhouse

How to properly water and feed oregano so that the leaves are juicy and aromatic?

Watering:

• In spring and autumn – 1-2 times a week.
• In summer – 3 times a week.
• In winter – no more than once every 10 days.
• Use warm, settled water (+18…+22°C).
• Avoid overwatering – oregano does not tolerate excess moisture.

Top dressing:

1. 2 weeks after planting – nitrogen fertilizers (urea 10 g/m²) for the growth of greenery.
2. During active growth – complex mineral fertilizers (nitrophoska 15 g/m²).
3. Before flowering – phosphorus-potassium fertilizers (superphosphate 20 g/m², potassium sulfate 15 g/m²).
4. After harvesting – organic fertilizers (ash infusion, compost tea).

Expert tip: Don't use too much nitrogen - this will encourage rapid growth of greenery but will reduce the concentration of essential oils in the leaves.

Growing Oregano in a Greenhouse

Growing Oregano in a Greenhouse – is an affordable way to provide yourself with fresh and aromatic greens all year round. The main thing is to choose the right variety, create optimal conditions and follow the rules of care.

Results:

• Oregano grows well in loose, neutral soil with good aeration.
• To ensure a bountiful harvest, it is important to provide sufficient lighting and moderate watering.
• Fertilizers must be balanced - excess nitrogen reduces the aroma of the plant.
• Regular harvesting encourages re-growth, allowing you to harvest several times per season.

Want to create ideal conditions for growing oregano? Choose greenhouses from NovaTeplitsa – they provide reliable plant protection and create an optimal microclimate. Check out the models on our website and start growing oregano with maximum efficiency today!