Winter is the most difficult period for any houseplant. But for the most flowering, this is also the most important season. After all, how the plant “rests” determines whether it will delight you with flowers in spring or summer. Flowering plants almost always requires cool temperatures, which are not always easy to create in ordinary apartments. Cacti, pelargoniums, rhododendrons, and most exotics need a cool period. What kind of house plants, for sure, will not bloom without a cool winter, I will tell in this article.What house plants do not bloom without a cold winter?
The need for a cold or cool wintering is a factor that most often “scares away” from replenishing the home collection with another flowering novelty. After all, the conditions for plants need to be strictly observed, and not everyone can brag about the presence of a place with lower temperatures in the winter - a loggia, a balcony, an entrance hall, a cool northern room or a corridor. And the area of the "winter apartment" is most often very limited.
Unfortunately, almost all the brightest plants bloom only after a cool winter regime, with the exception of very undemanding ones. A cool period is needed even for those plants that bloom in winter - usually their dormant phase shifts to the end of autumn and the beginning of winter, but still they need a “winter” in the cold.
1. Cacti - all flowering species
To bloom cacti, you need bright lighting, proper care in the spring and summer, and mandatory cold wintering. The average temperature for wintering cacti is from 5 to 10 degrees. Only forest moisture-loving species, such as discocactus or melocactus, winter at a temperature of about 15 degrees.
Also read our material 20 indoor cacti and succulents with amazingly beautiful flowering.
2. Pelargoniums of all types and varieties
Classical zonal pelargonium with its elegant leaves and dazzling umbrellas; luxurious pelargonium is large-flowered and even smelling of lemons, apples, cedar, nutmeg or orange, fragrant pelargonium winter better in cool.
+ 10 degrees is an ideal wintering value for any geranium, but they can withstand a lower temperature (up to +3 degrees), and a little higher.
Read also our material Pelargonium wintering rules on the windowsill and basement.
3. Azalea rhododendrons and other flowering shrubs
Miniature potted rhododendrons became famous not so much with dense leathery foliage as blooming like lush clouds. Admire the inimitable inflorescences from double or simple, painted in all shades of the pink-red gamut of flowers, you can only if in October contain rhododendrons at a temperature of +5 to +10 degrees (before opening the first flower buds).
The same wintering indices are needed for the flowering of common myrtle, citrus, nematanthus, camellia, manuka, abutilon and panicled leptosperm. Of the flowering shrubs, only hibiscus is contained in a warmer environment - from +10 degrees.
4. The magnificent Ethiopian Zantedesia
Calla Calla, as we like to call it a potted and cut plant with luxurious bedspreads around cob inflorescences and large wavy leaves, winters in bright light, dry and at a temperature of +8 to +12 degrees Celsius from October to the end of December and about +15 degrees in January-February.Zantedeschia Ethiopian (Zantedeschia aethiopica).
5. Stefanotis is abundantly flowering and other flowering vines
Inimitably delicate Madagascar jasmine for the production of narrow tubular flowers in beautiful inflorescences requires wintering at temperatures of about +12 degrees Celsius (maximum, +15 degrees). But gentle airing and increased lighting are no less important for him.
Huge, similar to cavalry stars, blue passiflora flowers on flexible shoots of a plant will bloom only after wintering in cool, ventilated rooms. Ideal indicators for passion flower + 7 ... +12 degrees.
Mandeville Sander and Medinilla with their bright flowering will prefer a temperature of 15 degrees Celsius in winter. But multi-flowered jasmine, bougainvillea naked and mandeville loose should be kept at 5-10 degrees.
Read also our article Stefanotis - royal flowering, aroma and moods.
Colorful bells from one of the closest to live bouquets of indoor plants of streptocarpus appear only if neat lush bushes from November are moved to cool. The optimum temperature for the resting period of this plant is from +12 to +14 degrees, with accurate lower watering without overmoistening.Streptocarpus (Streptocarpus).
7. Sinningia-gloxinia and its competitors
Bells of enormous size with luxurious ruffles on the background of velvet with large rounded leaves at the syningia will open only after a completely dry period of rest. Tubers in the dried substrate or outside it contain at a temperature of +10 to +15 degrees.
Temperatures from +12 to +15 degrees are also suitable for hippeastrum, hemanthus (deer tongue), cyclamens, cinnabar clivia.
8. False pepper nightshade
Poisonous and bright Jerusalem cherry in the winter is better to keep not just cool, but almost in the cold - a temperature of +8 to +10 degrees. This is the only condition that allows the plant to bloom, and the owners - for a long time to admire the beauty of dotted thick bushes with frosted lanceolate leaves of colorful fruits.
The same wintering temperatures are preferred by the Nerter of Grenada (coral berry).False pepper nightshade (Solanum pseudocapsicum).
9. Rose and other garden plants
Magnificent shrubs and herbaceous perennials, which successfully grow in an indoor or partially garden format, need a wintering similar to garden tub plants.
Potted roses, hydrangeas, piggyback and Co should winter in bright light and at a temperature whose values are as close as possible to +5 degrees. But perennials, such as primrose and common-bell, prefer wintering at + 10 ... +15 degrees.
Read also our article 10 secrets of growing indoor roses.
10. Indoor annuals
All short-lived and seasonal, in need of frequent replacement with young plants indoor species, will prefer a cool wintering. These are the Byzantine schizanthus and eustoma (from +5 to +10 degrees), cineraria (+ 8 ... +10 degrees), calceolaria (a month at a temperature of +10 degrees), gerbera, exakum and catharanthus (+ 15 ... +16 degrees).
Many other species will also prefer wintering at a moderate temperature of about 15 degrees - Jacobinia, ixora cochineal, balsam, gloriosa gorgeous, poinsettia-Christmas star, columna, briofillum, beautiful browllia, curdia curtius, anthurium, anigosanthus, allamanda, eschinanthus.Calceolaria (Calceolaria).
What flowering plants do not need a cool wintering?
If you do not have the opportunity to provide the right wintering conditions for these handsome men, do not despair: in the huge assortment of indoor plants there are many species that will bloom even without a cold dormant period.
Unconditional "classics" stand out among them - spathiphyllum, begonias, kalanchoe, impassable mimosa and senpolia. There are also exotic, extravagant and dazzlingly beautiful species - for example, multi-flowered pavonia, hoya, lanceolate pentas, gardenia, fiery violet, spice, turmeric, funnel-crossander, codonanta thick-leaved, akalifa, carrodendrons, yellow paulistachis or ruellia.
It is worth taking a closer look at non-capricious phalaenopsis and other orchids, for which the daily temperature difference is enough (zygopetalyum, vanda, paphiopedilum, cattleya).
Proper care in the cool
For any plants wintering at low temperatures, careful inspections are needed, maintaining cleanliness, but most importantly, the correction of irrigation and top dressing. Watering has been reduced since the fall, drying the substrate more and more and adhering to the recommendations for a particular species exactly.
With a full dormant period and leaf dropping, watering is almost stopped, and foliage-preserving plants are watered gently, maintaining light soil moisture and allowing the substrate to dry. Overfilling, dampness, stagnation of water in pallets in the cool are unacceptable. Fertilizing completely stops and does not resume until the beginning of growth and transfer to heat.