Question 1

When should I plant Dahlias in Zone 2A?

Accepted Answer

In USDA Zone 2A (average last frost May 30): start seeds indoors around May 2; transplant around Jun 6;

Question 2

When should I plant Dahlias in Zone 3B?

Accepted Answer

In USDA Zone 3B (average last frost May 15): start seeds indoors around Apr 17; transplant around May 22;

Question 3

When should I plant Dahlias in Zone 4A?

Accepted Answer

In USDA Zone 4A (average last frost May 8): start seeds indoors around Apr 10; transplant around May 15;

Question 4

When should I plant Dahlias in Zone 4B?

Accepted Answer

In USDA Zone 4B (average last frost May 1): start seeds indoors around Apr 3; transplant around May 8;

Question 5

When should I plant Dahlias in Zone 5A?

Accepted Answer

In USDA Zone 5A (average last frost Apr 25): start seeds indoors around Mar 28; transplant around May 2;

Question 6

When should I plant Dahlias in Zone 5B?

Accepted Answer

In USDA Zone 5B (average last frost Apr 18): start seeds indoors around Mar 21; transplant around Apr 25;

Question 7

When should I plant Dahlias in Zone 6A?

Accepted Answer

In USDA Zone 6A (average last frost Apr 21): start seeds indoors around Mar 24; transplant around Apr 28;

Question 8

When should I plant Dahlias in Zone 6B?

Accepted Answer

In USDA Zone 6B (average last frost Apr 10): start seeds indoors around Mar 13; transplant around Apr 17;

Question 9

When should I plant Dahlias in Zone 7A?

Accepted Answer

In USDA Zone 7A (average last frost Apr 5): start seeds indoors around Mar 8; transplant around Apr 12;

Question 10

When should I plant Dahlias in Zone 7B?

Accepted Answer

In USDA Zone 7B (average last frost Mar 28): start seeds indoors around Feb 28; transplant around Apr 4;

Question 11

When should I plant Dahlias in Zone 8A?

Accepted Answer

In USDA Zone 8A (average last frost Mar 20): start seeds indoors around Feb 20; transplant around Mar 27;

Question 12

When should I plant Dahlias in Zone 8B?

Accepted Answer

In USDA Zone 8B (average last frost Mar 12): start seeds indoors around Feb 12; transplant around Mar 19;

Question 13

When should I plant Dahlias in Zone 9A?

Accepted Answer

In USDA Zone 9A (average last frost Feb 28): start seeds indoors around Jan 31; transplant around Mar 7;

Question 14

When should I plant Dahlias in Zone 9B?

Accepted Answer

In USDA Zone 9B (average last frost Feb 15): start seeds indoors around Jan 18; transplant around Feb 22;

Question 15

When should I plant Dahlias in Zone 10A?

Accepted Answer

In USDA Zone 10A (average last frost Feb 1): start seeds indoors around Jan 4; transplant around Feb 8;

Question 16

When should I plant Dahlias in Zone 10B?

Accepted Answer

In USDA Zone 10B (average last frost Jan 15): start seeds indoors around Dec 18; transplant around Jan 22;

Question 17

When should I plant Dahlias in Zone 11A?

Accepted Answer

In USDA Zone 11A (average last frost Jan 1): start seeds indoors around Dec 4; transplant around Jan 8;

Zone	Last Frost	Start Indoors	Transplant	Direct Sow
Zone 2A	May 30	May 2	Jun 6	—
Zone 3B	May 15	Apr 17	May 22	—
Zone 4A	May 8	Apr 10	May 15	—
Zone 4B	May 1	Apr 3	May 8	—
Zone 5A	Apr 25	Mar 28	May 2	—
Zone 5B	Apr 18	Mar 21	Apr 25	—
Zone 6A	Apr 21	Mar 24	Apr 28	—
Zone 6B	Apr 10	Mar 13	Apr 17	—
Zone 7A	Apr 5	Mar 8	Apr 12	—
Zone 7B	Mar 28	Feb 28	Apr 4	—
Zone 8A	Mar 20	Feb 20	Mar 27	—
Zone 8B	Mar 12	Feb 12	Mar 19	—
Zone 9A	Feb 28	Jan 31	Mar 7	—
Zone 9B	Feb 15	Jan 18	Feb 22	—
Zone 10A	Feb 1	Jan 4	Feb 8	—
Zone 10B	Jan 15	Dec 18	Jan 22	—
Zone 11A	Jan 1	Dec 4	Jan 8	—

🌸 When to Plant Dahlias

📅 Planting Calendar by USDA Zone