Best Annuals for Southeast-Facing Window Boxes in Minnesota

Your southeast-facing window boxes get morning sun. Impatiens and vinca won't grow — leaves brown, plants stall. You want variety and color that thrives in this spot.

Fix the Foundation First

• Fresh soil every year. Old soil compacts, loses nutrients, harbors pathogens.
• Drainage holes are non-negotiable. Waterlogged roots = dead plants.
• Water daily in hot sun — mornings only. Check soil daily; water when dry.
• Feed steadily: Mix time-release fertilizer (Osmocote) + granular organic (Flower-Tone) into soil at planting. Feeds all summer.

Top Performers for Morning Sun / Afternoon Shade

• Scaevola (fan flower) — heat-tolerant, cascading, nonstop blooms
• New Guinea Impatiens — larger flowers, better sun tolerance than classic impatiens
• Marigolds — tough, colorful, pest-resistant
• Cupheas (incl. Mexican Heather) — textured foliage, unique flowers, loves heat
• Super-Petunias / Superbena (Proven Winners) — bred for vigor, no deadheading, all-season color

Refresh soil, ensure drainage, feed right, and pick these proven winners — your boxes will shine from June to frost.