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New Guinea Impatiens/Sun Impatiens

Use our zone-based planting guide to know when to plant New Guinea impatiens/sun impatiens.

Plant name Zone Start seeds indoors (spring/fall) Start seeds outdoors (spring/fall) Plant seedlings/transplants outdoors (spring/fall) Plant spacing # plants per person
New Guinea Impatiens/Sun Impatiens 3a Feb. 1-15 Not recommended On/around May 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 3b Feb. 1-15 Not recommended On/around May 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 4a Feb. 1-15 Not recommended On/around May 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 4b Feb. 1-15 Not recommended On/around May 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 5a Jan. 1-15 Not recommended On/around April 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 5b Jan. 1-15 Not recommended On/around April 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 6a Jan. 1-15 Not recommended On/around April 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 6b Jan. 1-15 Not recommended On/around April 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 7a Jan. 1-15 Not recommended On/around April 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 7b Jan. 1-15 Not recommended On/around April 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 8a Dec. 1-15 Not recommended On/around March 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 8b Dec. 1-15 Not recommended On/around March 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 9a Nov. 1-15 Not recommended On/around Feb. 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 9b Nov. 1-15 Not recommended On/around Feb. 15 (after last frost) 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 10a 12-14 weeks before planting outdoors Not recommended year-round 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 10b 12-14 weeks before planting outdoors Not recommended year-round 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 11a 12-14 weeks before planting outdoors Not recommended year-round 12-15 inches n/a
New Guinea Impatiens/Sun Impatiens 11b 12-14 weeks before planting outdoors Not recommended year-round 12-15 inches n/a

* Can be started from seed, but is most commonly purchased as starter plants. If growing from seed, start approximately 12 weeks before the average last frost date. Starting seeds outdoors not recommended. Plant seedlings or transplants outside after the threat of frost has passed.