The Warm Greenhouse

Underground Greenhouse Designs

Having sung the praises of the cool greenhouse, which offers so much lor a relatively modest heating cost, let us look now at the warm greenhouse in which a minimum temperature of 10 to 13 C. 50 to 55 F. is maintained during the winter months. Obviously, such a greenhouse allows one to be even more ambitious and to grow many more plants than would otherwise be possible. A warm greenhouse is appreciated more during the winter and early spring than at any other time of year. Plants like the...

Introduction

The cultivation of plants in a greenhouse is one of the most fascinating branches of gardening and there can be few gardeners who have not. at some time or another, had the desire to grow plants under glass. In this new edition of my book, greatly enlarged and completely re-illustrated. I have endeavoured to show what greenhouse gardening can offer and the wide range of beautiful plants which can be grown. To be successful, however, one must create conditions within the greenhouse which are as...

Zygocactus

Since the Christmas Cactus, Zygmwius minimus, is such a popular and useful plant. I shall describe its cultivation in Mime detail. As its common name implies, flowering usually occurs over the Christmas period, and if not then, certainly very soon afterwards. The colour of the flowers is deep pink and they appear at the end of the leaf-like segments. The habit of growth is pendulous and pieces of ygocactus are often grafted on to another upright cactus, such as pereskia. to make a standard...

Growing Iris In A Hothouse

Two dwarf irises are much grown in pots and very attractive they are the deep purple and gold Iris reticulata and the rich blue I. histrioides see p. 20 . Several bulbs can be grown in a 3-in. pot and John Innes No. 1 Potting Compost is recommended. The bulbs should be set about 1 in. below the surface of the compost. House in a cold frame until growth starts and then bring into the greenhouse, Dutch and English irises can be grown in the same way but in 5-in. pots. The Siberian Squill, Scilla...

Contents

The Hamlyn Publishing Group LirniioJ London New York Sydney Toronto Hamlyn House. Fcltham. Middlesex. Engianii Filmset in Great Britain by Filmtype Services Limited. Scarborough Printed and bound in The Canary Islands by Litugratia A. Romero, S.A. Santu C'ru de Tenerife. Canary Islands Spain Firs published by W. H. and Collingridge Limited in 1963 Revised edition published in 1972 Third impression. 47.1 Percy Thrower and The Hamlyn Publishing Group Limited, I C.3, 1972 An A to Z Guide to...

The Unheated Greenhouse

The unhealed greenhouse is a valuable asset to any gardener hut it is rather limited in its scope. The choice of plants must necessarily he restricted to the more hardy or those which need only slight protection during the winter months. An unhealed greenhouse becomes more useful if it is lined with thin polythene sheeting to serve the same purpo .- as double glazing. This certainly helps to keep out less severe frosts and maintain a higher temperature, thus making it possible to grow a w ider...

Euphorbia

Cephalocereus Senilis

Euphorbia is a huge family including plants of many different kinds but the one I would mention now is Euphorhiu splentlcns. the Crown of Thorns, a species which bears scarlet bracts and sharp thorns. This will make a succulent, shrubby plant up to 3 fl. tall. It likes a sunny position The lithops are the Living Stone or Pebble Plants, all natives of South-west Africa and intriguing in their mimicry of stones or pebbles as the common names suggest. Lithops alivuccu, with yellow flowers, isa...

Colour Illustrations

Anthony Htixley. Elsa Megson. Sheila Orme and Harry Smith for the photographs used in Abutilon megapotamicum 26 Achimenes Allamanda cat hart ica 27 Anthurium andreanwn Dimorphotheca Goiiath Exacum affine Tuberous begonia Winter-flowering begonia 35 Beloperme guttata Brunfelsia calycina Neoregelia carolinae Aporocactus flagelliformis Camellia japonica 50 Calceolaria Katanchoe Echeveria retusa 51 Chrysanthemum Goya Charm chrysanthemums 54 Perpetual-flowering...

Making a Choice

Oehme Van Sweden Plant Choices

Whim choosing a greenhouse much depends on the site selected, the kind of plants one wishes to grow and. of course, the amount of money one is prepared to spend. All modem greenhouses, whether of wood or metal construction, incorporate the minimum amount of either of ihese materials to allow in the maximum amount of light. With this in mind the strong, lightweight, non-rusting alloys of which most metal houses are nowadays con-strucled must always win, but wooden houses will always, one...

Types of Greenhouse

Lean Greenhouse Plans

It would be a very demanding gardener indeed who would not be able to find a greenhouse completely to his liking from Ihe wide range that are now available. Between the cheapest and the most expensive models there is almost an embarrassing richness of choice. I have something to say on this matter of choice on p. 14, but before considering this important decision for even the smallest, most modestly equipped greenhouse will mean quite a bit of expense it is necessary to discuss the different...

Greenhouse Equipment

Builders Sieve Price

Above A mist propagatot greatly facilitates the rooting of cuttings, and is a boon of the busy gardener Below Staging can be made of various materials Here, the top drawings show wooden slats, and the lower one corrugated asbestos covered with gravel Tiered staging is particularly useful when an attractive display is re quired in the greenhouse An extremely wide range of equipment is available for greenhouses, some essential and the rest aiming, in one way or another, to make life easier for...

Siting and Erecting a Greenhouse

Erecting Greenhouse

There often seems to he some doubt as lo whether a greenhouse shouid be sited north to south or east to west. In practice I find that this makes little difference, I consider it more important to site the greenhouse so that it fits in with one s other gardening plans the plants are then positioned in the greenhouse so that their requirements are most nearly matched. Obviously, those plants requiring the maximum amount of sunshine will be placed on the south side, if this can be managed, and...

Lorraine Begonias

Planting Daffodils Pots

These are the fibrous-row led. winter-flowering begonias and they are delightful plants. They arc more graceful than the tuberous begonias and lhe stems arc more wiry . A minimum temperature of 16 C. 60 F.J is needed to grow ihem welt Cuttings. To obtain young basal grow ths for cuttings the stems of the plants are cut hack to wiihin a few inches of their base afier flowering. Kepi in warm conditions new shoots soon develop and these can be removed in February as cuttings. A suitable rioting...

The Cool Greenhouse

Poor Man Orchid

The cool greenhouse is one which is kept absolutely frost free and in which a minimum temperature of 4 C. 40 F. is maintained. If the temperature is nearer to 10 C. 50 F. so much the betler for many plants, excluding annuals which much prefer a temperature nearer 4 C. This kind of greenhouse is sheer delight for the adventurous gardener, for compared with the unhealed greenhouse the scope is wide indeed. There is no difficulty in having plants in flower during every month of the year. If you...

The Sun Lounge and Conservatory

Achimenes Hybrida Dot

In so far as the plants which are grown in them are the same, the sun lounge and conservatory are virtually synonymous, but of course there are certain differences which make the use of ihe two terms meaningful. The term sun lounge invariably refers to a light, airy, very glassy structure attached to a modem house whereas the word conservatory is usually applied to the heavier structures rather more wood or cast iron and rather less glass than in the sun lounge attached to older houses....