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Growing Amaranth in Surabaya

🇮🇩 Zone 13 Planting Guide · Tropical savanna climate

USDA Zone 13 365 frost-free days 90-120 days to harvest

Quick Answer: Growing Amaranth in Surabaya

Yes, you can grow Amaranth in Surabaya, ID! Plant during Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec for best results. Surabaya is in USDA Zone 13 with a Tropical savanna climate, offering 365 frost-free days per year. The difficulty level is medium, and Amaranth takes 90-120 days to harvest. Amaranth needs full sun and moderate watering.

Climate Match Analysis

Good Match Surabaya + Amaranth

Surabaya's temperatures (24°C to 34°C) are within the tolerable range for Amaranth (10°C to 38°C), though not always in the optimal zone (20°C to 30°C). Plant during recommended months for best results.

Amaranth tolerates 10°C to 38°C
Optimal: 20°C - 30°C
Surabaya range 24°C to 34°C

Surabaya Climate Data

USDA Zone
13
Frost-Free
365days
Winter Low
24°C
Summer High
34°C
Rainfall
1500mm/yr
Climate
Aw
Tropical savanna

Amaranth Planting Calendar for Surabaya

Green months show the best time to plant Amaranth in Surabaya

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Plant Amaranth Not recommended

Amaranth Growing Requirements

☀️

Sunlight

Full Sun

6+ hours direct sunlight

💧

Water

Moderate

Keep soil consistently moist

📅

Days to Harvest

90-120

From planting to first harvest

📊

Difficulty

medium

Some experience helpful

💡 Growing Tips for Amaranth

Direct sow after last frost. Drought-tolerant once established. Wait until soil warms to at least 20°C before transplanting outdoors — cold soil stunts growth and can invite root rot. Water steadily but avoid soggy soil. A 5-cm layer of organic mulch helps balance moisture and suppress weeds.

Frost tolerance: Amaranth is NOT frost tolerant — wait until after the last frost in Surabaya.

How to Grow Amaranth in Surabaya

Surabaya, ID is in USDA Hardiness Zone 13 with a Tropical savanna climate (Köppen Aw). With winter lows of 24°C and summer highs of 34°C, the growing season spans approximately 365 frost-free days. Amaranth grows well with some gardening knowledge in this climate.

Amaranth thrives in temperatures between 20°C and 30°C, requiring full sun and moderate watering. In Surabaya, the best months to plant Amaranth are January, February, March, April, May, June, July, August, September, October, November, December. Amaranth is not frost tolerant, so it's important to wait until after the last spring frost before transplanting outdoors. Expect to harvest in approximately 90-120 days after planting.

Surabaya receives 1500mm of annual rainfall, which provides good natural moisture for Amaranth. Monitor soil moisture and water as needed.

Other Plants That Grow in Surabaya

More plants you can grow alongside Amaranth in Surabaya

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Frequently Asked Questions

Can I grow amaranth in Surabaya?

Yes! Amaranth can be successfully grown in Surabaya, ID. Surabaya is in USDA Hardiness Zone 13 with a Tropical savanna climate. The difficulty level for growing Amaranth here is rated "medium". The best months to plant are January, February, March, April, May, June, July, August, September, October, November, December.

When should I plant amaranth in Surabaya?

In Surabaya, the recommended planting months for Amaranth are January, February, March, April, May, June, July, August, September, October, November, December. Surabaya has 365 frost-free days per year, with winter lows of 24°C and summer highs of 34°C. Since Amaranth is not frost tolerant, make sure to plant after the last frost date.

How long does amaranth take to grow in Surabaya?

Amaranth typically takes 90-120 days from planting to harvest. In Surabaya's Tropical savanna climate with 365 frost-free days, you have plenty of time to grow Amaranth to maturity. Direct sow after last frost. Drought-tolerant once established. Wait until soil warms to at least 20°C before transplanting outdoors — cold soil stunts growth and can invite root rot. Water steadily but avoid soggy soil. A 5-cm layer of organic mulch helps balance moisture and suppress weeds.

Can I grow amaranth indoors in Surabaya?

Amaranth can potentially be grown indoors in Surabaya with proper conditions. It requires full sun (6+ hours of direct light — a south-facing window or grow lights recommended). Indoor growing extends your season beyond the Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec outdoor planting window. Use containers with good drainage and moderate watering.

What month do I plant amaranth in Surabaya?

Plant Amaranth in Surabaya during January, February, March, April, May, June, July, August, September, October, November, December. These are the optimal months based on Surabaya's USDA Zone 13 climate, 365 frost-free days, and temperature range of 24°C to 34°C.

Is amaranth hard to grow in Surabaya?

Amaranth is rated "medium" to grow in Surabaya. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Amaranth in Surabaya is Good.

What grows well with amaranth in Surabaya?

In Surabaya, you can grow many companion plants alongside Amaranth. Good options from the same planting window include Tomato, Basil, Lettuce, Carrot and 2 more. These plants share similar planting months and thrive in Surabaya's Zone 13 climate.

Does amaranth need full sun in Surabaya?

Amaranth requires full sun. In Surabaya, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.

Last updated: March 2026 · Climate data from NOAA, FAO, USDA

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