Thunbergia or Clock Vine - Garden Basics - Flower - Annual
(Thunbergia alata)
Clock
vines are cottage garden favorites. They look good in hanging
baskets, mixed containers and arbors. The vines can grow to five
or six feet high if given good support. Clock vines don't bloom
well during high summer heat and humidity, but they will make
up for lost time when the weather cools off, blooming well into
October.
Take cuttings from overwintered plants or sow seeds indoors six to eight weeks before the last frost. Germination takes two to three weeks, and seedlings grow very slowly. Wait until the soil has warmed up and night temperatures remain above 50 degrees to transplant outdoors. Place transplants six inches apart about three inches from a support. Supports will be covered quickly after the plants become established. Soil should be moist and high in organic matter. Sunny mornings and afternoon protection are appreciated.
- Type
annual -
Propagation
seeds or cuttings -
Light
full sun with light shade in afternoon -
Flower Color
yellow, white -
Bloom Time
summer and autumn -
Height
five to six feet -
Width
6 inches -
Soil Requirements
moist, compost enriched -
Zones
all -
Uses
arbors, hanging baskets, along walls and fences
