GardenCauliflower variety
Amethyst Cauliflower
✓ In your garden
Amethyst is a purple cauliflower, ready in about 59 days. Grown for its tight central curd, it likes steady cool weather and even water — a stressed plant makes a loose, ricey head. Grow it in spring or fall.
“A cool-season cauliflower grown for its tight curds.”
Growing basics — shared by every cauliflower
Amethyst grows like any other cauliflower. The full picture — how deep to plant, spacing, feeding, pests, harvest — lives on the Cauliflower page so it's maintained in one place.
- Sun
- Full Sun
- Spacing (in row)
- 18–24 in
- Row spacing
- 24–36 in
- Planting depth
- 0.25–0.5 in
- Soil pH
- 6–7
- Water
- Moderate
What is Amethyst good for?
- Roasted & ricedCaramelizes beautifully. Great
- Raw & cruditéCrisp florets. Great
- PicklingClassic in a jar. Great
From how it grows — kitchens vary.
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Want the full 10/50/90% odds + nearest stations? Open the frost tool →When to plant Amethyst in your zone
Zone 6bGreenhouse or cover on: your start slides ~4 weeks earlier and your harvest stretches ~3 weeks later (shown striped).
Planting seeds straight in the ground only works where the season's long and warm — most gardeners start seeds indoors or buy young plants, or you'd pick your first tomato right as frost hits.
Comfortable — first ripe fruit lands around mid May, well before your typical frost (~late Oct).
- Start seeds indoors
- mid Feb – early Mar
- Toughen up outside
- mid Mar – mid Mar
- Move plants outside
- mid Mar – early Apr
- Growing
- early Apr – mid May
- Picking
- mid May – early Jun
Typical dates for zone 6b — set your zone or ZIP above for yours.
What to plant near Amethyst — and what to keep away
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Aromatic HerbsTrialed
Mixed, strong-smelling plantings make brassicas harder for pests to find — real research, modest effect. Keep mint in a pot.
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DillTrialed
Dill flowers feed the tiny parasitoid wasps that hunt cabbage worms. Let some of it bloom near the bed.
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Flea Beetle Trap StripTrialed
A trap strip pulls flea beetles off young seedlings. UMN found mixes of three-plus trap species beat any single one.
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BeetsTraditional
On the classic chart's companion list for the cabbage family.
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NasturtiumTraditional
On the WVU companion list, with an aphid-magnet reputation. If aphids pile on, pull those plants before they breed.
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Onions & garlicTraditional
Old chart pairing; both hold cool-season beds.
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PotatoesTraditional
Old chart pairing.
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Beans PoleTraditional
Chart canon says no. Nobody's proven why. Cheap to respect.
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StrawberryTraditional
Flagged on the classic charts, including WVU's. Mechanism murky; the canon is consistent.
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TomatoTraditional
Flagged on the classic charts, mechanism murky. Skip the pairing if you've got the space.
The badge is the honesty. Trialed = a published field trial · Practical = a real mechanism · Traditional = companion-chart lore. These pairings hold for every cauliflower.
Pairings compiled from University of Minnesota Extension, West Virginia University Extension.
Growing Amethyst — the things that trip people up
- For a pure-white head, “blanch” it: when the curd is egg-sized, tie the outer leaves up over it to shade it (self-blanching and colored types skip this).
- Brassicas are cool-season — they bolt or turn bitter in summer heat, so grow them in spring and fall. Feed them well and watch for cabbage worms (the little green caterpillars); a floating row cover keeps the moths off.
Amethyst cauliflower at a glance
| Type | Purple |
|---|---|
| Days to ripe | 59 days after you plant it outside |
| Color | Purple |
Extra fields from seed-catalog listings and university growing guides. Days to ripe and disease resistance shift with your climate and seed source — double-check with your local extension office before you buy.
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Common questions about Amethyst
How long does Amethyst take to grow?
About 59 days from transplant. Start seeds indoors and set out young plants for the best heads.
When should I grow Amethyst?
In the cool of spring or fall — brassicas bolt and turn bitter in summer heat. Fall crops often taste best, sweetened by a light frost.
Browse more cauliflower varieties →