Kohleria

Kohleria is a large genus of Central and South American tropical herbs. All grow from, and produce, scaly rhizomes at their roots. Leaves are generally hairy, sometimes with attractive reddish mottling, and the flowers are usually brightly coloured, with attractive spotting.

Kohlerias are fairly adaptable plants for growing under lights, and will also do very well in a tropical greenhouse. They are somewhat more difficult for windowsill culture in most home conditions. Koellikerias will do well in the open under lights, but prefer an enclosed environment with high humidity.

It is important to remember that both genera are adapted, through their scaly rhizomes, for a period of dormancy. After some months of growth and bloom, most will begin to lose their attractive appearance -- they are preparing for dormancy, and should be allowed to dry out between light waterings. The top growth can be cut off after the leaves have mostly died.

At this point, the long scaly rhizomes can be removed from the soil ball, and divided into manageable lengths. It is not unusual for a rhizome to grow to a length of eight to twelve inches, and these can be broken into one or two inch lengths, for potting up in fresh soil.

How many are put into each pot will depend on the cultivar and the grower's intentions. Some of the leggier cultivars are grown as hanging plants, and multiple rhizomes in a plant will each produce a "crown", which will trail attractively over the edge of the pot. Other more upright cultivars can be grown with a single "crown", from a single rhizome, although multiple "crowns" can also look quite attractive.

Kohlerias may also be propagated from tip cuttings, which will root readily when taken from a plant that is growing vigorously. Some growers keep Kohlerias in constant bloom by taking tip cuttings at the peak of the plant's vigour, rooting them, and repeating the process with the new plants. Dormancy can sometimes be avoided altogether with this strategy.

When the plants are growing vigorously, it is important to provide both adequate moisture and plenty of nutrients -- Kohlerias can be heavy feeders. A constant feed method of 1/4 tsp of 60% fertilizer (e.g. 20-20-20 or 15-30-15) per gallon of water will be adequate for most plants, if watering is frequent. Slightly higher fertilizer concentrations may be desirable for some very robust cultivars.

A standard potting medium will work well, if it is well-drained as well as somewhat moisture retentive. I like to use a 2-1-1 mix (peat, perlite, vermiculite), with about 25% packaged potting soil (the kind with real dirt in it).

Good light is important, and coolish temperatures do not seem to be a barrier to good growth, and may produce stronger plants.

The Kohlerias are among my favourite gesneriads. Their spectacular flowers and pleasantly hairy leaves make for a very worthwhile and decorative horticultural subject.

Kohleria and Koellikeria were once thought to be closely related genera.  However, recent phylogenetic studies have shown that they are not closely related, and all Koellikeria species have been relocated the redefined Gloxinia genus.

  

Kohleria species


Kohleria allenii

Kohleria allenii flowers and buds
For Kohleria bella, see Kohleria 'Bella', below.

752s.jpg (3349 bytes)
Kohleria bogotensis

753s.jpg (3024 bytes)
Kohleria bogotensis flowers


Kohleria eriantha

1074s.jpg (3762 bytes)
Kohleria eriantha (?)

Kohleria grandiflora (Smithsonian)

Kohleria hirsuta (USBRG 96-163)

Kohleria hirsuta USBRG-163 flower

Kohleria hirsuta (USBRG 96-163)

Kohleria hirsuta GS07 (USBRG-96-163)

Kohleria hirsuta
751s.jpg (2224 bytes)
Kohleria inequalis

Kohleria inequalis x K. spicata (natural hybrid)

Kohleria peruviana GS07
749s.jpg (2969 bytes)
Kohleria rugata 1
750s.jpg (2642 bytes)
Kohleria rugata
2


Kohleria rugata 3

 
Kohleria spicata

 
Kohleria tubiflora


Kohleria warszewiczii

 

 

Kohleria hybrids

1033s.jpg (3926 bytes)
Kohleria 'Ampallang' face

1036s.jpg (3817 bytes)
Kohleria
'Ampallang' flower

1124s.jpg (3989 bytes)
Kohleria 'Ampallang' plant

1108s.jpg (3640 bytes)
Kohleria 'Ampallang' show plant

Kohleria 'Ampallang' flowers

Kohleria 'Bella'

Kohleria 'Bella' flowers

Kohleria 'Brazil Gem'

Kohleria 'Carnival'
1104s.jpg (2719 bytes)
Kohleria 'Cinnamon Toast'

Kohleria 'Connecticut Belle'
748s.jpg (2913 bytes)
Kohleria 'Dark Shadows'

Kohleria 'Dragon's Blood'
865s.jpg (3508 bytes)
Kohleria 'Empress'
866s.jpg (3089 bytes)
Kohleria 'Empress' flower
1117s.jpg (3024 bytes)
Kohleria 'Emily Roberts'

Kohleria 'Green Goblin'

Kohleria 'Green Goblin' flower
917s.jpg (3643 bytes)
Kohleria hybrid (bogotensis x K. warszewiczii)
914s.jpg (2376 bytes)
Kohleria hybrid (bogotensis x K. warszewiczii)
1058s.jpg (3173 bytes)
Kohleria hybrid (bogotensis x 'Sciadotydaea Hybrid
1062s.jpg (1830 bytes)
Kohleria hybrids (bogotensis x 'Sciadotydaea Hybrid'

Kohleria 'Jester' AGGS02

Kohleria 'Kapo' plant

Kohleria 'Kapo'

Kohleria 'Laura'

Kohleria 'Peridots Kitlope'

Kohleria 'Peridots Kitlope' flowers
 
Kohleria 'Peridots Kitlope' GS07

Kohleria 'Princess' (detail)

Kohleria 'Princess'
1103s.jpg (2770 bytes)
Kohleria 'Punch'
1059s.jpg (3446 bytes)
Kohleria 'Sciadotydaea Hybrid'
746s.jpg (2530 bytes)
Kohleria 'Selby' flowers
747s.jpg (2901 bytes)
Kohleria 'Selby' stem
 
Kohleria 'Silver Feather'

Kohleria 'Snakeskin'

Kohleria 'Strawberry Fields'

Kohleria 'Strawberry Fields' flowers

1140s.jpg (3544 bytes)
Kohleria 'Strawberry Fields' 2


Kohleria 'Sunshine' flowers

Kohleria 'Sunshine'
     

 

Intergeneric hybrids

1054s.jpg (4090 bytes)
xGlokohleria 'Goblin'

 

Home

Gesneriad
Genera

Alphabetical
Listing

Botanical
Overview