Species Hawaiian cotton
golden brown, cotton-like flowers with golden brown sepals, brown stems, and palmate-shaped green leaves with smooth margins

Hawaiian cotton

Gossypium tomentosum

The Hawaiian cotton plant (Gossypium tomentosum) is truly amazing. Endemic to the Hawaiian Islands, this native species is an essential part of the natural ecosystem and is often used in traditional Hawaiian culture. It can thrive in rocky and dry conditions and also produces strong fibers which are often used in lei-making and other crafts. Furthermore, its flowers are edible and its seeds may be used to make oil. Hawaiian cotton is also relatively pest-resistant and has a moderate tolerance for salt. It is truly an incredible species and its numerous uses have made it of great importance in the Hawaiian Islands.

Cycle:

Perennial

Watering:

Average

Propagation:

Seed Propagation,Cutting,Layering Propagation,Division,Grafting Propagation

Hardiness Zone:

10 - 12

Flowers:

Bright yellow Flowers

Sun:

Full sun

Leaf:

Yes

Leaf Color:

green

Growth Rate:

Low

Maintenance:

Moderate

Drought Tolerant:

Yes

Care Level:

Medium

watering

Hawaiian cotton should be watered once a week with just enough to moisten the soil, not so much that the soil becomes soggy. Ideally, water should be applied at the base of the plant and allowed to slowly soak into the soil at a depth of up to 8 inches. Check the soil moisture by pressing your finger into the top 1-2 inches. If the soil is still damp, then no additional water should be applied. If the soil feels dry, then lightly water until the soil is just moist.

sunlight

Hawaiian cotton (Gossypium tomentosum) prefers bright sunlight and warmth for optimal growth. This plant should receive at least 4-6 hours of direct sunlight per day. However, too much direct sunlight can be harmful and can cause scorching of the leaves. It’s best to place this plant in a location that receives partial to full sun in the morning or late afternoon and in an area that is protected from any strong winds.

pruning

The best time for pruning Hawaiian cotton is during the summer, or when the plant is in its active growth period. This is usually late May or early June. Pruning should be done gradually over several months, rather than once a year, in order to encourage healthy regrowth and flowering. Begin by removing any dead or diseased branches, as well as any branches that are overly thin or congested. Next, trim back any branches that are growing too close to 1 another. Finally, remove any branches that are poorly shaped or damaged. For most shrubs, pruning should be done by removing 1-third of each branch. This will help to maintain a natural shape and promote continued vigorous growth.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Hawaiian cotton typically starts flowering in April.

Hardiness Map