You need a heated greenhouse or conservatory where the temperature never drops below 20°C/70°F to safely grow these rare bulbous plants known in Latin as Hymenocallis. Very closely related to Amaryllis (note the similar strap like leaves) these are amongst the most beautiful of flowers carrying a heavy vanilla perfume to add to their pristine […]
A greenhouse or conservatory without much direct sunlight is not the perfect place for tender flowers, crops and many tropical plants. However even in the tropics there are damp shady cool places under the canopy and down in grottos and fissures. In those sites you find all sorts of ferns growing, often luxuriantly and many […]
Apios is one of those forgotten greenhouse gems seldom come across nowadays. It was once very popular in late Victorian times for the violet scent from the small racemes of purplish flowers. However after the First World War the shortage of labour and its slight tenderness made this plant unattractive. Indeed in the UK it […]
Polygala x Dalmaisiana is a superb choice for conservatories and cool greenhouses with beautiful purple pea like blooms throughout much of the year. These decorative flowers are produced almost continuously along the ends of lax stems of attractive grey green evergreen foliage. Not so much an impressive centre piece perhaps but excellent as the supporting […]
I recently wrote that for a glasshouse watercress was the most nutritious crop you could grow, and that still stands. However the huge productive capacity under cover can be more efficiently harnessed to produce even more healthy nutrition. And a very succulent, delicious and tasty increase this is; from growing baby salad leaves. You see […]
An extremely architectural glass-house and house-plant is Yucca elephantipes, the Spineless Yucca or Palm-lily. This is a closely related species to Adam’s Needle (Y. filamentosa), the hardy Yucca of the open garden. Don’t worry the Palm-lily does not have such cruelly pointed leaves. There is still a vestigial point to each but nowhere near as […]
A cool frost free glasshouse is perfect for this house plant from the Mediterranean loved since Classical times. Cyclamen is the original Greek, name for this genus of a dozen or so native to Europe and North Africa. One of the Primrose family these have bulbous corm like tubers, masses of remarkably attractive variegated leaves, […]
This depends on so many different factors. We might consider concentration, range or sheer quantity of vitamins produced. Or minerals, antioxidants, antho-cyanins each contains and so on. Any contender will be lesser value if the crop comes all at once and has difficult storage or processing, ideally it’s continuous year round. And of course it […]
More a house than a glasshouse plant the Snake plant, Sanseviera trifasciata, is actually a very useful specimen in either place. Many plants are described as bomb-proof, the Snake plant is as close as you can get. Drought and shade seem to leave it untouched, cold is no problem though a real freeze will be. […]
You need a generous greenhouse to freely accommodate Yacon as this can easily grow two, three or more metres high. Fortunately it can also be cut back down so you can squeeze one into a smaller space. But be warned this has expansionist tendencies and in small houses is best confined in a large tub […]
Once rare glasshouse specimens Peperomias are now common house-plants everywhere you go. Coming mainly from Mexico, the West Indies and South America these have not long been in cultivation most of them being discovered only from the mid nineteenth century. The great Paxton in his Botanical Dictionary of 1868 listed four dozen species and subspecies; […]
A frost free greenhouse that stays cool all summer is perfect for this exotically perfumed climber. Indeed this is excellent run along high wires in a shady greenhouse or conservatory as this will seldom get too hot and there will be enough light next to the glass. Mandevilla suaveolens is a tender deciduous climber from […]
