VegetablesMustard Greens
Brassica juncea
Mustard greens (Brassica juncea) are a fast-growing annual leafy green with a hot, spicy flavor. Sow in spring or fall in full sun to part shade, and keep the soil evenly moist.
How to grow mustard greens
Side by side
Pick two or three seeds to see how they grow, side by side: sprouting, spacing, sun, water, frost and pet safety in one table.


Comparing Mustard Greens vs. English Cucumber vs. Armenian Cucumber
The comparison
| Fact | ![]() | ![]() | ![]() |
|---|---|---|---|
| Difficulty | Easy | Moderate | Moderate |
| Life cycle | Annual | Annual | Annual |
| Germination time | 7–10 days | 5–10 days | Not yet verified |
| Germination temperature | 13–18 °C55–64 °F | 18–29 °C64–84 °F | Not yet verified |
| Sowing depth | 1.5 cm½ in | 2.5 cm1 in | Not yet verified |
| Spacing between plants | Not yet verified | 23–30 cm9–12 in | Not yet verified |
| Days to maturity | 25–50 days from sowing | 50–65 days from sowing | Not yet verified |
| Sun | Full sun, partial shade | Full sun | Full sun |
| Water | Moderate | High | Moderate |
| Containers | Yes | Yes, 3.8 L or largerYes, 1 gal or larger | Not yet verified |
| Frost tolerance | Not yet verified | Tender (no frost) | Tender (no frost) |
| Soil pH | pH 6.0–8.0 | pH 6.0–6.5 | Not yet verified |
| Links |
Up close
What each one is, in a few lines, with the full growing guide one click away.
VegetablesBrassica juncea
Mustard greens (Brassica juncea) are a fast-growing annual leafy green with a hot, spicy flavor. Sow in spring or fall in full sun to part shade, and keep the soil evenly moist.
How to grow mustard greens
VegetablesCucumis sativus
A warm-season annual vine grown for crisp, long fruit. Sow after the last frost in full sun, keep the soil evenly moist, and expect to manage pollination, bitterness and pests.
How to grow english cucumber
VegetablesCucumis melo var. flexuosus
Armenian cucumber is a warm-season vine in the melon species, grown from seed for its edible fruit, which is eaten fresh or in salads.
How to grow armenian cucumberKeep comparing
Add a third seed, or swap one for a close relative from the same category.

Mustard Greens vs. Acorn SquashMustard Greens against another vegetable
English Cucumber vs. Acorn SquashEnglish Cucumber against another vegetable
Armenian Cucumber vs. Acorn SquashArmenian Cucumber against another vegetable
Mustard Greens vs. ArtichokeMustard Greens against another vegetable
English Cucumber vs. ArtichokeEnglish Cucumber against another vegetable
Armenian Cucumber vs. ArtichokeArmenian Cucumber against another vegetableThe table, row by row
Every row is a fact from each seed's own profile, lined up so the differences stand out.
Germination time and temperature
How many days the seeds take to sprout, and the temperature range they sprout in.
Sowing depth and spacing
How deep to sow each seed and how far apart the plants should grow. “On the surface” means the seed isn't covered.
Days to maturity and life cycle
How long until the plant is ready, counted from sowing or from transplanting (each value says which). Annuals live one year, biennials two, perennials longer.
Sun and water
Full sun means 6 or more hours of direct sun a day, partial shade a few hours. Water needs are rated low, moderate or high.
Containers, frost tolerance and soil pH
Whether it grows in a pot, with the smallest pot when it's known. Frost tolerance runs from tender (no frost) to hardy. Soil pH 7 is neutral.
Toxicity to cats and dogs
Whether the plant is toxic to cats and dogs.
Quick wins
Days from sowing until the first shoots appear, in good conditions.
Pet friendly
Listed as non-toxic to both cats and dogs. Each seed's page has the details.
Not safe for pets: borage, buckwheat, caraway, carnation and 14 more.
Comparing
Each seed's page explains how to grow it from seed, with facts researched and reviewed by our editors.