“Why are you growing houseleeks in your greenhouse?” said a friend looking at some Echeverias I had around the base of a Bougainvillea. An easily made mistake for these are a fine example of parallel evolution. Houseleeks are temperate plants designed to survive conditions as harsh and impoverished as crevices of dirt on rock-piles or […]
Okay of the many tender glasshouse plants Saintpaulias can be one of the trickiest. Yet almost everyone knew an aunt with a massive old African violet enduring on for years blooming almost perpetually. It will have been the original blueish violet flowered Saintpaulia ionantha, and it was probably set on a table in some north […]
Happier as warm greenhouse specimens than as houseplants are the gorgeously flamboyant Peacock and Zebra plants, the Calatheas, from Tropical America. Oh you can force some such as C. insignis or C. zebrina to live in a well lit house but most are much happier in a warmer more humid atmosphere, it’s their tropical jungle […]
For a wonderful display in your greenhouse or conservatory all winter through you just cannot beat Chinese Lanterns. These are long stems festooned with numerous orange ‘flowers’ and so called as they so closely resemble brilliantly coloured paper decorations. Also known as Bladder Cherries Physalis alkekengi really are most distinctive and have been grown since […]
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 […]
