Artichoke Seeds,
Green Globe

3.818 ReviewsSKU: #AR101Min. seed count: 75
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Description

Tasty! Needs a fairly long, mild growing season, or can be grown as an annual. This colorful plant makes a great ornamental.

Growing Tips: Sow indoors 2 to 3 months before average last frost. Transplant to rich, deep, well-drained soil. Seedlings require chill period (nights below 45°F, but above freezing) to produce 'chokes.  More Artichoke and Cardoon Growing Tips >>

Plant Details

Botanical Name
Cynara cardunculus var. scolymus
Life Cycle
Perennial in zones 7–10
Sun Requirement
Full sun
Days to Germinate
10–21
Days to Maturity
120–180
Planting Depth
¼–½ in.
Plant Spacing
18 in.
Ideal Temperature
60–80°F
Frost Hardy
Yes

When to Grow

Sow Green Globe indoors 2 to 3 months before your average last frost, 1/4 to 1/2 inch deep; seeds germinate in 10 to 21 days. Transplant into rich, deep, well-drained soil in full sun, 18 inches apart.

Seedlings require a chill period, nights below 45 F but above freezing, to produce 'chokes. Allow 120 to 180 days to harvest; the plant needs a fairly long, mild growing season and is perennial in zones 7 to 10, or it can be grown as an annual.

How to Sow and Plant

  • Artichokes typically take two years to produce a crop, but they can be coaxed into flowering the first year.
  • To get a crop of artichokes in one year, start seeds indoors in pots 2 to 3 months before the last frost date in spring. Move the pots outdoors when four leaves have developed.
  • Sow seeds 1/4 to 1/2 inch deep.
  • When temperatures are occasionally freezing, protect plants if temperatures fall below 29 degrees.
  • Two to four weeks of exposure to cool temps “vernalizes” the young seedlings, preparing them to bloom later in the season after plants have grown large.
  • Cardoons may also be started early indoors, but vernalizing isn’t necessary.
  • Seeds germinate in 10-21 days.
  • Ideal germination temperature is 60-80 F.

How to Grow

  • Both artichokes and cardoons prefer 6-12 hours of full sun.
  • In very hot summer areas, they may benefit from some mid-afternoon shade.
  • Provide rich, deep, well-drained soil and ample moisture.
  • Seedlings require a chill period (nights below 45 F but above freezing) to produce artichokes.
  • Mature plants produce many buds over a long season. Simply cut off each bud, with an inch of stem, when it has reached its full size but before the “scales” begin to separate, which signals that the bud is about to bloom.
  • After harvest you can cut the plant down to the ground and mulch it. Mulching can allow artichokes to act as a perennial in zones 5 or 6, where there are usually not sustained periods of deep freezes.

PESTS/SPECIAL CONSIDERATIONS

  • Artichokes require frequent irrigation in order to produce large, tender heads. At the same time, make sure that the soil drains well, as the plants do not like waterlogged soil and will have a tendency to rot in these conditions.
  • Mulching can help retain moisture and reduce the rate at which you need to water.
  • Common pests with artichokes include armyworms and aphids.

How to Save Seeds

Saving sunflower seeds is very easy!

  • Artichokes and cardoons produce big thistle flowers that, once open, display a bright purple flower.
  • In order to collect seed, let the flower dry on the stalk.
  • If you have harsh winters, harvest it partially dry and continue drying the flower inside.
  • Once dry, remove the once-purple stamens. Below the stamens you will find dandelion-like seed heads with a seed at the bottom.
  • In order to select the largest seeds, you may need to dig down further into the center of the flower. Using scissors or tweezers can help extract the seeds.
  • Once the seeds are extracted from the dry flower head, finish air drying them and then store them in a cool, dry place for the winter.

FAQ

My plants grew well but never formed heads. Why?

Seedlings require a chill period, nights below 45 F but above freezing, in order to produce 'chokes. Without that cool stretch early on, you get the plant but not the harvest.

Can I grow Green Globe outside zones 7 to 10?

It is a frost-hardy plant that lives on as a perennial in zones 7 to 10, and it needs a fairly long, mild growing season. It can also be grown as an annual, started indoors 2 to 3 months before the average last frost and transplanted into rich, deep, well-drained soil.

Is it worth a spot in the garden just for looks?

Yes. This colorful plant makes a great ornamental, and it grows tall, so give each one 18 inches of space in full sun. Tasty as well, at 120 to 180 days to maturity.

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