Janosik Watermelon with slices and melon balls on a white background.
Watermelon Seeds, Janosik
Janosik Watermelon with slices and melon balls on a teal colored background.
Janosik Watermelon with slices and melon balls on a white background.
Watermelon Seeds, Janosik
Janosik Watermelon with slices and melon balls on a teal colored background.

Watermelon Seeds,
Janosik

4.212 ReviewsSKU: #WM204Min. seed count: 25
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Description

(Citrullus lanatus). A famous and wonderfully delicious, yellow-fleshed Polish variety. Oblong fruit to about 10 lbs. The extra sweet, yellow flesh is lovely in contrast with the dark green rinds. Crisp and delicious! Beautiful, uniform fruit and one of the best eating bright yellow types!

Growing Tips: Janosik watermelon thrives in warm weather and fertile, well-drained soil. Incorporate compost or organic fertilizer before planting, and mulch to retain moisture and suppress weeds. Space generously to allow vine spread and rotate crops annually to prevent soilborne disease. Provide consistent watering during early growth and fruit development.

Plant Details

Botanical Name
Citrullus lanatus
Life Cycle
Annual
Growth Habit
Vining
Sun Requirement
Full sun
Days to Germinate
5–10
Days to Maturity
80–90
Planting Depth
1 in.
Plant Spacing
36–48 in.
Ideal Temperature
70–95°F
Frost Hardy
No

When to Grow

Start seeds indoors 3–4 weeks before the last frost or direct sow outdoors once soil temperatures reach 70°F. Transplant or sow only after danger of frost has completely passed. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

How to Sow and Plant

Sow 2–3 seeds 1 inch deep per hill, spaced 3–4 feet apart. Thin to the healthiest plant after germination. Select a site with full sun exposure and good drainage.

How to Grow

Water deeply once or twice weekly depending on rainfall. Reduce watering once fruits start to ripen to boost sugar concentration. Fertilize with a phosphorus-rich, organic formula when vines begin to spread. Monitor for pests such as cucumber beetles and control weeds to reduce competition.

How to Save Seeds

  • Choose fully ripe or overripe fruits from healthy, true-to-type plants.
  • Scoop seeds from the flesh and rinse in a strainer to remove pulp.
  • Spread seeds on a screen or paper towel in a warm, dry place out of direct sunlight for 7-10 days.
  • Stir daily to ensure even drying.
  • Once completely dry, store in an labeled, airtight container in a cool, dark place.

FAQ

What color is the flesh of Janosik watermelon?

Janosik watermelon has vibrant, golden-yellow flesh with a sweet, tropical flavor. It's a beautiful and delicious alternative to red or pink-fleshed varieties, perfect for unique garden harvests.

How big do Janosik watermelons get?

Fruits typically weigh 6 to 10 pounds, making them manageable in size for small households while still providing a generous amount of juicy, flavorful flesh.

Is Janosik watermelon suited for cooler climates?

Yes, Janosik performs well in both temperate and warm climates. Its relatively short growing season makes it suitable for northern growers when started early or grown under black plastic mulch.

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