Apartment plants

Sanseveria - Sansevieria trifascata


Sanseveria


Rhizomatous evergreen succulent plant from southern and western Africa and Asia. It is made up of dense clumps of long, fleshy, dark green leaves, mottled with light green and silver; the bearing of the leaves can be of two types: some varieties are constituted by a dense rosette, while others have long leaves that grow erect. S. trifasciata has erect leaves with yellowish-green bands on the margins.
The rosette species have a fairly slow growth and remain fairly small in size, while the erect species grow slightly faster and grow up to 100-150 cm. In summer, from the base of the leaves grow two to three long white spikes that cover small, greenish-white, intensely scented flowers.

Sanseveria Exhibition



These plants need bright positions but do not tolerate direct sunlight; they fear the cold, so they can be taken outside in spring and summer, while for the rest of the year they must be kept indoors. However, these plants are not very demanding and grow well even in the shade. It is a plant that comes from subtropical or desert environments, characterized by high temperatures, low rainfall and rather poor and draining soils. The cultivation of the sansevieria It is very simple: in all our peninsula it is recommended to grow it in the apartment. During the summer it is possible to move it outside, on a terrace or in the garden, as long as light and heat are not excessive.
To ensure optimal development it is advised, from April to October, to maintain temperatures always between 18 and 27 ° C and to ensure a very bright exposure (near a window to the south or west or under a pergola), avoiding direct light that could cause leaf burns. However, the shadow is not a problem, it only slows down the growth and can cause the disappearance of streaks and sidebands.
In winter it is possible to induce a slight vegetative rest by adjusting the temperature to 15 ° C (without however ever falling below 13 ° C) and shading a little more.
Very cold or hot drafts can be very harmful. Then place it in a sheltered area.

Sanseveria watering



Like many other succulent plants also the Sanseveria does not need much water, especially in the cold months; throughout the year it is good to let the soil dry completely between one watering and another. Supply fertilizer once a month during the vegetative period, avoiding excess.
Irrigations must be very moderate and you must always make sure that no stagnation occurs. During the summer, it is done on average once a week, making sure that the substrate is dry, leaving it to drain well and always avoiding the use of saucers. It is preferable to use lukewarm water (also tap water) since the sansevieria It is sensitive to thermal shocks. It is very important to pour it on the ground, avoiding the area of ​​the collar and the heart of the rosette: in fact, areas where the rots settle very easily.
In winter we postpone even more: it is usually enough to lightly irrigate every 15-20 days.
We always keep the leaf surface clean, but we avoid the use of polishes that, over time, clog the stomata preventing normal transpiration.




















































Land and repotation of Sanseveria


It has no special soil requirements, provided it is well drained, to avoid water stagnation; use of the normal one composed of vase mixed with sand and expanded clay. Repot every 2-3 years, or at least when the rhizomes have completely filled the jar, choosing a container slightly larger than the previous one.
In nature the Sansevieria is able to withstand long dry seasons thanks to the ability to store liquids in the leaves. It is therefore important to use a draining soil, which dries quickly, removing the most frequent danger in the apartment: root and collar rot.
Repotting is usually done in spring, waiting at least three years from one time to another. We choose a container just bigger than the previous one and pay particular attention not to damage the roots. We create a thick draining layer on the bottom and fill it with a very draining compost: the ideal one is obtained with 2/3 of excellent quality soil and 1/3 of river sand or perlite.

Multiplication



The best way to multiply the sanseverie and certainly the division of the tufts of rhizomes, which can be practiced throughout the year, but preferably in spring. The portions used should consist of a few leaves, 3-4 at the most, and should preferably have some vigorous roots. Avoid over-watering new plants for a few months. In spring you can practice leaf cuttings, remembering that cuttings of variegated plants produce green plants.

Pests and diseases


This plant fears the root rot very much, which however should not worry us if we supply little water.

Sanseveria pruning


Sanseveria is not a plant that is pruned and pruning interventions of this species are very limited. Sanseveria cleaning cuts can be made to remove the dry or rotten from the plant to remove those parts of the plant that have dried out. Another intervention that can be carried out is the removal of any sick parts, a cut that is made to eliminate these infected portions of the plant and to prevent any fungi or bacteria from multiplying and spreading on the plant and to the other plants.
As always for pruning, also for cutting the sanseveria we use clean and disinfected instruments to avoid propagating any fungi or bacteria left on the blades after other pruning operations on possible infected plants.

THE SANSEVERIA IN BRIEF
Family, genus, species Agavaceae, gen. Sansevieria, about 60 species
Type of plant Succulent, flat, compositions of cacti
Height at maturity From 15 cm to 2 m
Width at maturity From 15 to 60 cm
Maintenance Low, simple
Water needs Low
Minimum temperature 13 ° C
Ideal temperature 18-27 ° C
Exposure Very bright, no direct light / even light shade
Ground Very light and draining: 2/3 soil, 1/3 sand or perlite
Fertilizer Balanced, for houseplants or cacti. Liquid every 3 weeks
soil pH Neutral to sub-alkaline




















Repotting and substrate



In nature the Sansevieria is able to withstand long dry seasons thanks to the ability to store liquids in the leaves. It is therefore important to use a draining soil, which dries quickly, removing the most frequent danger in the apartment: root and collar rot.
Repotting is usually done in spring, waiting at least three years from one time to another. We choose a container just bigger than the previous one and pay particular attention not to damage the roots. We create a thick draining layer on the bottom and fill it with a very draining compost: the ideal one is obtained with 2/3 of excellent quality soil and 1/3 of river sand or perlite.

Sanseveria fertilization


To stimulate growth it is good to distribute a balanced fertilizer every 3 weeks. Liquid formulations for green plants or cacti are suitable. You can also opt for granular, osmotic or stick fertilizers: they are very practical, provide nourishment for a long time and constantly.

Variety of Sanseveria



The Sanseviera genus is composed of about 60 species, different in size, bearing and coloring of the leaves. This great variability makes this plant very adaptable to different environments, furnishings and needs of the grower.
Sanseveria trifasciata
It is the most widespread species in our homes. The dimensions are very variable, given that there are dwarf and other highly developed cultivars, which can even exceed one meter in height.
The species has dark green leaves with cream and silver side bands.
However, some of its horticultural varieties are very common:
'Laurentii': very common, with more intense yellow side bands.
'Hanii': very small (15 cm) and with leaves distributed in a rosette. Suitable for mixed compositions. Also available with silver side bands with the name 'Silver Hanii'.
'Moonshine' light green leaves with dark green thin side stripes.
Sanseviera cylindrical Suitable for large vessels (may exceed one meter in height); the leaves, very decorative, are cylindrical and turn on themselves. They are a beautiful dark green with lighter horizontal stripes.
Sansevieria hallii Among the most contained (up to 30 cm in height). Suitable for small vases and compositions; very decorative thanks to the rosette-shaped leaves and the spiral shape. The color is dark green with fine silvery horizontal stripes.
Libyan Sanseviera Medium in size, rarely exceeding 90 cm, it has leaves with a more rigid consistency. The color is particular: dark green with light bands and a reddish outline.
Sansevieria zeylanica Among the largest: up to 2 meters total. It has triangular rosette leaves of a beautiful dark gray almost glaucous and horizontal streaks darker or lighter. It has pleasant flowers from white to greenish.
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THE CALENDAR OF SANSEVERIA
repotting March April
Leaf-cutting division March April
Flowering March-July
Vegetative rest October to February