Growing Herbs in the Garden Greenhouse

How to Grow Herbs in the Garden Greenhouse

Herbs easily earn their place in any greenhouse —they produce so much flavour in a small space!

 

Summer harvest

Basil (Ocimum basilicum) and sweet marjoram (Origanum vulgare) flourish inside in the summer. Although they are perennial in hot climates, it is easiest to grow them fresh from seed each year.

Sow seeds in early spring at a temperature of about 20°C, and keep young plants warm. Repot as necessary. Plant in the greenhouse border, or keep in pots, but use 20cm pots for basil as it needs plenty of nutrients.

growing-herbs-in-the-greenhouse To encourage new bushy growth, plants for culinary use must be picked continually and not allowed to flower. You should then be able to use them until late autumn. Aphids are the main problem.

 

Winter protection

In winter, the greenhouse is useful for protecting tender perennial herbs: for example, bay (Laurus nobilis), lemon verbena (Aloysia triphylla), and some species of lavender such as Lavandula dentata and L. stoechas. These all grow well in pots and can be put outside in the herb garden in summer

Many varieties of rosemary (Rosmarinus spp.) also benefit from winter shelter in cold areas. They will flower in the greenhouse from late winter onwards, giving blooms in all shades of blue from deep marine to almost white.

Top-dress established plants with worm compost, but be prepared to renew all of them except the slow-growing bay every three to four years. Left longer, they become woody and straggly or outgrow their pots. Scale insects are the main pest on bay trees, otherwise there are few problems.

 

Winter harvest

In the garden, clumps of herbaceous herbs such as chives (Allium schoenoprasum) and tarragon (Artemisia dracunculus) often need dividing in autumn. Put surplus pieces in pots and bring them into the greenhouse to produce fresh sprigs in early spring. Discard them when outdoor plants are ready for harvesting.

You can also harvest parsley (Petroselinum crispum) and chervil (Anthriscus cerefolium) most of the winter. Sow parsley in late summer in pots or in modules for planting later in the greenhouse border. Sow chervil at any time in autumn or spring as a seedling crop.

29. November 2010 by admin
Categories: Vegetable Gardening | Tags: , , | Comments Off on Growing Herbs in the Garden Greenhouse

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