Beans
56days to harvest
7-14 daysdays to germinate
Z2–11USDA zones
Easydifficulty
Heirloom

Sowing

Direct sow after last frost when soil temperature reaches 60°F

Cultivation

Sun
Full sun (6+ hours)
Water
Regular
Soil
Well-drained, fertile soil
Spacing
4-6 inches
Height
12-18 inches
Season
Warm season annual

Appearance & flavour

Colour
Deep purple
Size
5-5 1/2"
Shape
Bush
Flavour
Very good flavor both raw and cooked, with tender mild taste and slight sweetness; turns green when cooked.

In the kitchen

Fresh eating, cooking, steaming, stir-fries

Pests, disease & resistance

Pests
Bean beetles, spider mites, aphids
Diseases
Bean anthracnose, rust, powdery mildew
Resistance
One or more races of Bean Mosaic Virus (High)

Planting calendar by USDA zone

ZoneStart indoorsTransplantDirect sowHarvest
1——July – AugustSeptember – August
2——June – AugustSeptember
3——June – JulyAugust – October
4——June – JulyAugust – October
5——May – JuneAugust – September
6——May – JuneJuly – September
7——April – JuneJuly – August
8——April – MayJune – August
9——March – AprilMay – July
10——February – AprilMay – June
11——January – MarchApril – May
12——January – MarchApril – May
13——January – MarchApril – May

Companion planting

8 beneficial pairings indexed for this variety, 3 to avoid.

MarigoldRepels bean beetles, aphids, and nematodes while attracting beneficial insects
BasilRepels aphids, spider mites, and thrips that commonly attack beans
CarrotsLoosens soil for bean roots and doesn't compete for nutrients
CornProvides natural support structure for climbing beans to grow on
SquashGround cover that conserves soil moisture and suppresses weeds
NasturtiumsActs as trap crop for aphids and cucumber beetles while deterring bean beetles
RadishesFast-growing companion that breaks up soil and deters bean root fly
Summer SavoryImproves bean flavor and repels bean beetles and aphids

Avoid

OnionsInhibits bean growth and nitrogen fixation through root secretions
GarlicStunts bean growth and interferes with beneficial soil bacteria
SunflowersAllelopathic compounds inhibit bean germination and growth

Nutrition (per 100 g)

Protein (g)
1.97
Fat (g)
0.275
Carbohydrate (g)
7.41
Fibre (g)
3.01
Vitamin K (µg)
43.9
Vitamin B6 (mg)
0.121
Calcium (mg)
40
Iron (mg)
0.652
Magnesium (mg)
28.2
Phosphorus (mg)
41.2
Potassium (mg)
290
Zinc (mg)
0.35

Where to buy seed and equipment

Some links are affiliate links. If you buy through them we may earn a commission at no extra cost to you.

Growing it? There is a full cultivation guide at the beans growing guide.

Cultivar facts compiled from public horticultural references including USDA GRIN and NC State Extension. Descriptions are original to this catalogue.

DarkGrow forum

Grown Amethyst?

Post a crop report — day counts, reservoir readings, what worked. Variety-specific logs are the most useful thing on the forum.

Similar varieties

Other beans with a comparable time to harvest, so a season that suits Amethyst suits these too.

Browse all 84 beans