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Flower Annual Beginner Level πŸͺ΄ Container Friendly

Cosmos

Cosmos is a Annual Flower that thrives in USDA Zones 2–11. It requires full_sun and takes around 50–90 days to mature.

SunlightFull Sun
Water NeedLow
Days to Maturity🌱 50–90 days
USDA ZonesπŸ—ΊοΈ 2–11
Starts FromπŸ“¦ Seed
Transplant Indoor Seed Start Direct Sow

πŸ“… US Planting Timing

πŸͺ΄
Start Indoors
6 weeks
before last frost
🌾
Direct Sow
+7 days after frost
πŸ”„
Transplant
+14 days after frost

🌑️ Temps & Growth (Fahrenheit)

πŸͺ± Soil Temp
Minimum60Β°F
Optimal70–80Β°F
πŸ’¨ Air Temp
Minimum50Β°F
Optimal70–85Β°F
🌱 Germination Temp
Minimum65Β°F
Optimal70–75Β°F
❄️ Frost Toleranceβ–² Low
πŸ”₯ Heat Toleranceβ–²β–²β–² High
GDD Base Temp 50Β°F Growth stops below this temp
GDD Required 1200 Heat units needed to mature

πŸ“ Garden Spacing & Soil

Spacing (Inches)

Plant Depth0.25" (in)
Plant Spacing12" (in)
Row Spacing18" (in)
Square Foot (SFG)1 plants per sq. ft.

Soil & Water

pH Range6.00 – 8.00
DrainageWell Drained
Water/Week0.5 – 1" inches
Soil TypesLoamSandyClay

πŸͺ΄ Container Gardening

This plant is highly suitable for growing in pots, grow bags, or urban balconies.

Min. Depth 12" (in)
Min. Volume 3 Gal

🌎 US State Planting Forecast

Where can you plant Cosmos right now? Based on current weather, soil temperature & frost calendar for each state.

2 βœ… Ready
26 ⚠️ Risk
22 🚫 Not yet
AK ⏳ Oct 15, 04:00 AKDT AL ⚠️ Oct 15, 07:00 CDT AR βœ… Oct 15, 07:00 CDT AZ ⏳ Oct 15, 05:00 MST CA ⚠️ Oct 15, 05:00 PDT CO ⏳ Oct 15, 06:00 MDT CT ⏳ Oct 15, 08:00 EDT DE ⚠️ Oct 15, 08:00 EDT FL ⚠️ Oct 15, 08:00 EDT GA ⚠️ Oct 15, 08:00 EDT HI ⚠️ Oct 15, 02:00 HST IA ⚠️ Oct 15, 07:00 CDT ID ⏳ Oct 15, 06:00 MDT IL ⚠️ Oct 15, 07:00 CDT IN ⚠️ Oct 15, 08:00 EDT KS ⚠️ Oct 15, 07:00 CDT KY ⚠️ Oct 15, 08:00 EDT LA ⚠️ Oct 15, 07:00 CDT MA ⏳ Oct 15, 08:00 EDT MD ⚠️ Oct 15, 08:00 EDT ME ⏳ Oct 15, 08:00 EDT MI ⏳ Oct 15, 08:00 EDT MN ⏳ Oct 15, 07:00 CDT MO ⚠️ Oct 15, 07:00 CDT MS ⚠️ Oct 15, 07:00 CDT MT ⏳ Oct 15, 06:00 MDT NC ⚠️ Oct 15, 08:00 EDT ND ⏳ Oct 15, 07:00 CDT NE ⏳ Oct 15, 07:00 CDT NH ⏳ Oct 15, 08:00 EDT NJ ⚠️ Oct 15, 08:00 EDT NM ⏳ Oct 15, 06:00 MDT NV ⏳ Oct 15, 05:00 PDT NY ⚠️ Oct 15, 08:00 EDT OH ⚠️ Oct 15, 08:00 EDT OK ⚠️ Oct 15, 07:00 CDT OR ⏳ Oct 15, 05:00 PDT PA ⚠️ Oct 15, 08:00 EDT RI ⏳ Oct 15, 08:00 EDT SC ⚠️ Oct 15, 08:00 EDT SD ⏳ Oct 15, 07:00 CDT TN ⚠️ Oct 15, 07:00 CDT TX βœ… Oct 15, 07:00 CDT UT ⏳ Oct 15, 06:00 MDT VA ⚠️ Oct 15, 08:00 EDT VT ⏳ Oct 15, 08:00 EDT WA ⏳ Oct 15, 05:00 PDT WI ⚠️ Oct 15, 07:00 CDT WV ⚠️ Oct 15, 08:00 EDT WY ⏳ Oct 15, 06:00 MDT
Ready to plant Plant with caution Not recommended

πŸ“… Personal Planting Timeline

Your personalized schedule based on frost dates and current soil temperature. Showing default Zone 7 β€” set your location for exact dates.

❄️ Last frost: Mar 31 πŸ‚ First fall frost: Nov 26 βœ… 240 frost-free days
🏠
Start seeds indoors Feb 17
240 days ago
🌱
Direct sow outdoors Apr 7
191 days ago
πŸͺ΄
Transplant seedlings outdoors Apr 14
184 days ago
πŸ₯•
Earliest harvest May 27 ~
141 days ago
🏁
Latest harvest Jul 6 ~
101 days ago

πŸ’§ Watering Forecast

Need: 0.75" / week  Β·  based on forecast rain & evaporation

πŸ“ Set location for forecast
🌱

Enter your city or ZIP above to see a personalized 5-day watering schedule.

🌑️ Plant Stress Forecast

5-day temperature stress outlook for this plant

πŸ“ Set location for forecast
🌿

Enter your city or ZIP above to see if your plant will experience heat or cold stress this week.

🌑️ Growth Prediction

GDD-based harvest forecast Β· 1200 GDD needed

πŸ“ Set location & planting date
🌾

Enter your location and when you planted to get a personalized harvest prediction based on real temperature data.

🀝 Companion Planting

βœ… Plant Near

  • Cucumber
  • Dill
  • Marigold
  • Pepper
  • Tomato
  • Zinnia