How to grow Collard greens

Collard greens growing leaf vegetable plant of the species Brassica oleracea also known as Collard. Collard greens annual to perennial plant and also used as ornamental plant, grow in temperate, mediterranean or subtropics climate and growing in hardiness zone 2-10a spring planting 10a-11 in autumn planting.

Collard greens leaves

Leaves are wavy oval the color can be: green, green blue or purple. It’s possible to eat in the summer but sometimes in summer the leaves become little bit bitter.

Flower color yellow, small flowers grow on inflorescence.

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Requirements for Collard greens growing and care:

Clean Larvae from the leaves, sometime the plant need physically support

What is the best way to start growing?
Plant / Seedling / Seed / Vegetative

Is it necessary to use vegetative reproduction?
Vegetative recommend to Collard tree

Difficulties or problems when growing:
Sensitive to hot temperature, Pieris (butterfly) consume big amount of leaves

Planting season:
Spring / Autumn / Winter

Pests and diseases:
Pieris (butterfly), prodenia (Spodoptera)

Pruning season:
When it’s start to bloom unless you want the seeds

How to prune:
Prune the beginning of the inflorescence

Size of the plant?
0.3-2m, 12-80 inches

Growth speed in optimal condition:
Fast growing / Medium growing

Water requirement:
Average amount of water / Big amount of water

Light conditions in optimal condition for growing:
Full Sun / Half Shade

Is it possible to grow as houseplant?

Growing is also possible in a planter /flowerpot / containers:

Blooming information

Bloom season:

General information about the flower:
Small yellow flowers grow on inflorescence

Thinning the bloom:
Recommend to trim unless you want to save the seeds

Pollination is done by:
Bees, butterfly

Grow from seeds

Sowing requirement:
Not recommend sowing the collard tree because you never know what will be,
Small black seeds

Saving seeds until sowing:
Dry, Cold temperature

Sowing season:
Spring / Autumn

Planting spacing:
20-30 cm

Depth of Sowing:
1-2 cm

Conditions for seeds germinate:
Moist, drained soil, not too much warm temperature

Watering requires for Seeds:
Average amount of water

Germination time:
3-20 days

Condition of seedling:
Fertilized ground, light shade, regular watering, and cold temperature

Do the seeds require burying?


Collard tree – big collard, size can be 2 m’, big leaves green or purple, grow only from cutting

Collard Vates – light green and tender leaves

Georgia Collard – green – blue leaves, soft

Champion Collards – white stems, dark green leaves

Vegetative Reproduction

How to make Vegetative Reproduction in Collard greens?
Cutting – for the collard tree

The best time for vegetative reproduction in Collard greens:
Spring / Winter

How much time does it take to grow roots in vegetative reproduction?
2-5 weeks

What is the treatment for vegetative reproduction in Collard greens?
Put the cutting in water and change the water frequently or moist soil shade and vegetative hormones

Edible leaves

Leaves harvesting season:
All year, less in the summer

How to harvest the leaves?
Trim in the base of the leaf next to the stem

Information about leaves:
Leaves color: green, green blue or purple, the shape are oval and the leave can be in the size  the leaves become little bitter in the summer

Uses of Collard greens leaves:
Salad, cooked stir fry

Scientific name: Brassica oleracea convar. acephala

Blooming Seasons

Edible Parts

Culinary Uses

Flower Colors


Harvest season

Leaf color

Plant growing speed

Plant life-form

Plant uses

Planting season

Plants sun exposure

Watering plants

Hardiness zone