Growing Stocks in the Greenhouse

Few gardeners seem to grow stocks in their greenhouses but they are excellent for a cool greenhouse in late winter. The Beauty of Nice type are particularly recommended for cultivation under glass and they are available with rose, Pink, Violet, salmon and white flowers. There are also varieties which, if one selects only the lighter coloured seedlings, will produce entirely double flowers.

Sowing

The seed is best sown in September or October in pots or boxes filled with seed compost and stood in a shaded cold frame until germination takes place.

Seedlings

The flowers on my potting bench.

Image via Wikipedia

When the resulting seedlings can be safely handled they should be pricked out into boxes of John Innes No. 1 Potting Compost and placed in a frame where they will have cool, airy conditions. Before colder weather arrives they should be taken into a greenhouse with a temperature of about 7°C. (45°F.) but if circumstances dictate they can be overwintered in a cold frame, provided they are protected from severe frost. Cool treatment and plenty of light are essential at all times.

Potting

Young plants can be put first into 3-in. pots and later moved into 5-in. pots filled with John Innes No. 2 Potting Compost.

Ventilation

During the winter they must be kept in a light place and the roof ventilators should be opened a little whenever possible to avoid damp and stuffy conditions.

Watering and Feeding

Water must be given sparingly in winter and only when the soil is dry, for if over wet. The plants will damp off. Start feeding the plants once a week at the end of January, using a liquid or soluble fertiliser, and continue this until flowering begins.

01. March 2012 by Dave Pinkney
Categories: Greenhouse Gardening, Plants & Trees | Tags: , , , , | Comments Off on Growing Stocks in the Greenhouse

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