august 2011 Selenicereus grandiflorus

A more in depth look at individual cactus species, a new one is added each month -managed by Hob

Moderators: ElieEstephane, DaveW

Locked
User avatar
hob
Posts: 4425
Joined: Mon Jun 26, 2006 8:22 pm
Location: sfk england z 8

august 2011 Selenicereus grandiflorus

Post by hob » Mon Dec 19, 2011 1:42 pm

Selenicereus grandiflorus Britton & Rose
P1250276.JPG
P1250276.JPG (34.01 KiB) Viewed 5339 times
Growth Habits: Climbing branching plant that reaches several meters in length and uses trees to gain access to the light and to support its weight.

Scientific name: Selenicereus grandiflorus

Common names: Night blooming Cereus, Queen of the Night.

Synonym: Cactus grandiflorus, Cereus grandiflorus, Cereus knuthianus, Selenicereus knuthianus,Selenicereus hallensis

Etymology: Selenicereus meaning Moon Cereus. This indicates the nocturnal flowering habit.
grandiflorus meaning grand or big flower.

Origin: Eastern Mexico, Caribbean.

Light: Mine grows in the shade of the opaque roof of my sun room, in the wild they are often in the shade of the trees they grow in.

Compost: I'm using my standard cactus mix with added organic and weak fertilizer added to the watering.

Water: Regular weekly watering from spring to autumn I aim at keeping the soil moist all the time. in winter I stop watering and allow the soil to dry out.

Flower: Night flowering very large, up to 6 to 8 inches long (150 to 200mm) yellow/green thin outer with a white center.

Min temp: Not frost tolerant. I aim at a 5 deg c minimum for mine.

Cultivation: Grow in a large pot, mine is in a 12 inch pot, provide some kind of frame for it to climb up and spread out into...........requires a lot of space.

References.
http://www.cactiguide.com
http://www.desert-tropicals.com
http://en.wikipedia.org

Comments. Fast growing tropical plant that can grow several meters of stems in a growing season, mine has about 20 meters of stems going round the roof of my sun room.stems are usually covered in aerial roots making them look somewhat untidy.
well worth growing if you can find the room to let it run wild in,the flowers are spectacular and one of the biggest in the cactus world, watching the buds develop only adds to the show as they get bigger and bigger.

Sequence of images showing bud development.
P1230121.JPG
P1230121.JPG (24.19 KiB) Viewed 5339 times
P1250175.JPG
P1250175.JPG (32.15 KiB) Viewed 5339 times
P1250241.JPG
P1250241.JPG (26.02 KiB) Viewed 5339 times
P1250258.JPG
P1250258.JPG (18.7 KiB) Viewed 5339 times
Side view of flower
P1250280.JPG
P1250280.JPG (43.29 KiB) Viewed 5339 times
Large pot (with my rock collection)
P1270297.JPG
P1270297.JPG (58.32 KiB) Viewed 5339 times
Not easy to show such a large plant in one image, here is some of it.
P1270299.JPG
P1270299.JPG (44.85 KiB) Viewed 5339 times
Closer shot showing aerial roots.
P1270298.JPG
P1270298.JPG (46.67 KiB) Viewed 5339 times
Habitat image Photographer: Leland Smith
s_grandiflorus_f_600.jpg
s_grandiflorus_f_600.jpg (120.03 KiB) Viewed 5339 times

Locked