When should I plant Bunga Matahari in Zone 4a?

Start Bunga Matahari seeds indoors around Apr 14. Transplant outdoors after May 12. Expect first harvest around Jul 16.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.

Can I grow Bunga Matahari in Zone 4a?

Yes. Bunga Matahari needs 90 days to harvest. Zone 4a has a 149-day growing season, which is sufficient. You can plant up to 4 successions.

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🌻 Growing Bunga Matahari in Zone 4a

Zone 4a has cold winters and a moderate growing season. Timing is key for Bunga Matahari in this zone. Embun beku terakhir: May 5. Embun beku pertama: Oct 1.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 14Oct 1

Season: May 5 – Oct 1 (149 hari) · Succession: plant every 2 weeks (up to 4x)

Zona4a

Embun beku terakhirMay 5

Embun beku pertamaOct 1

Musim149 hari

Panen90 hari

MatahariMatahari Penuh

When to Plant Bunga Matahari in Zone 4a

Start Seeds Indoors: Apr 14

Start Bunga Matahari seeds indoors around Apr 14 (3 minggu sebelum embun beku terakhir). Optimal germination temperature: 75F. Germinates in 7-14 days.

Transplant Outdoors: May 12

Transplant Bunga Matahari seedlings outdoors after May 12. Wait until soil temperature reaches 55F. Space plants at 1/m² (30cm jarak). Harden off plants for a week before moving outside.

Harvest: Jul 16

First harvest approximately Jul 16 (~65 hari from transplant). Continue harvesting until first frost (Oct 1).

Tanaman Pendamping

✅ Mentimun✅ Labu ✅ Jagung✅ Kacang

❌ Kentang

Bunga Matahari in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

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