September's cooler temperatures and reliable rain make it the best month of the year for planting trees, shrubs, and perennials — even better than spring.
September is arguably the most underrated month in the garden calendar. Cooler temperatures, shorter days, and autumn rain create ideal conditions for transplanting trees, shrubs, and perennials — roots establish through fall and winter while the plant is dormant above ground, giving a significant head start over spring-planted specimens. Spring-blooming bulbs go in the ground from late September through November. Cover crops like crimson clover and winter rye can be sown on empty vegetable beds to prevent erosion, suppress weeds, and add organic matter when tilled under in spring. The vegetable garden still produces, with cool-season crops thriving in the gentler conditions.
Plant trees, shrubs, and perennials — fall planting gives roots months to establish before summer stress
Plant spring-blooming bulbs (tulips, daffodils, crocuses, alliums) 6–8 weeks before ground freezes
Sow cover crops (crimson clover, winter rye, field peas) on empty vegetable beds
Divide and transplant peonies, daylilies, and hostas while soil is still warm
Plant in groups of odd numbers (3, 5, 7) for a natural, non-regimented look when adding perennials and shrubs
Use September's fall color preview to plan where you need more deciduous trees or shrubs with autumn interest
Install landscape lighting while the ground is soft — trenching in frozen soil is miserable
Часто задаваемые вопросы
01 What should I plant in September?
September is prime time for trees, shrubs, perennials, and spring bulbs. Plant garlic cloves for next summer's harvest. Sow cover crops on empty beds. Direct-sow cold-hardy greens (spinach, mache, claytonia) for overwintering under row covers.
02 Why is fall planting better than spring for trees and shrubs?
Fall-planted trees and shrubs benefit from cool air temperatures that reduce transplant stress, warm soil that promotes root growth, and reliable autumn rain. Roots grow actively until soil temperatures drop below 40°F, giving months of establishment that spring-planted trees miss.
03 When should I plant spring bulbs?
Plant tulips, daffodils, and crocuses from late September through early November, at least 6–8 weeks before the ground freezes. Bulbs need this cold period to vernalize. Plant at a depth of 2–3 times the bulb's height, pointed end up.