Plant hostas in spring, which UMN calls the best time, or in early fall (Clemson, Almanac). Set the crown even with the soil surface, and plant potted hostas at the same depth they grew in the pot (UMN, Almanac). Space them 1 to 3 feet apart by variety (Clemson) in dappled or part shade with rich, moist, well-drained soil (UMN), and give them about 1 inch of water a week (UMN, Clemson). Hostas are hardy in about zones 3 to 9 (UMN, NC State). They are toxic to dogs, cats and horses (ASPCA).
Hostas, sometimes called plantain lilies, are shade perennials grown mostly for their leaves, which range from lime green to gold and blue-green, often edged in white or cream (UMN, Clemson). They are native to China, Japan, Korea and the Russian Far East, and there are more than 2,000 cultivars (NC State). Most grow 1 to 2½ feet tall (Clemson), though miniatures stay a few inches across and giants can reach 3 to 4 feet tall and 5 to 6 feet wide (UMN). Clemson says hostas are so long-lived they may outlive their gardeners.
When to plant hostas
| Timing | What the sources say |
|---|---|
| Spring | The best time, per UMN. Plant dormant bare-root divisions in early spring, when mail-order bare-root plants are more affordable and available (UMN). Clemson says spring before the leaves unfold |
| Early fall | The other good window (Clemson, Almanac). Iowa State lists hosta among perennials that can be divided in late summer to early fall, about September in Iowa, giving roots several weeks before winter |
| Summer | Possible with potted plants, but summer-planted hostas need extra water until their roots establish (UMN, Almanac). Clemson says plants divided in summer heat need much more care |
| Dividing clumps | Not needed for plant health (UMN, Almanac). If you want more plants, divide in early spring as the "eyes" emerge (UMN, Almanac); NC State suggests every 3 to 5 years. Clemson also divides in early fall |
Our planting calendar shows your frost dates. In spring, plant once the soil can be worked and the crowns are just waking up. For fall, aim for early fall, so new roots have several weeks before the ground freezes (GardenPal reasoning based on Iowa State's note on late-summer division). In the South, NC State says hostas need a winter dormant period below 40°F for a couple of months, so pick heat-tolerant types such as Hosta plantaginea (Clemson). Hosta leaves also come up just as spring bulb foliage fades and hide it (UMN), so they pair well with daffodils.
How deep and far apart to plant hostas
| Hosta plants | |
|---|---|
| Depth (bare root) | Crown, where roots meet shoots, even with the surrounding soil, with growing tips visible at the surface (UMN, Almanac) |
| Depth (potted) | At the same soil level as in the pot (UMN, Almanac). The Almanac digs a hole about twice the width and depth of the root ball to loosen the soil |
| Spacing | 1 to 3 ft apart, leaving room to grow (Clemson); the Almanac says to space by mature size |
| Light | Filtered or dappled shade for much of the day; they survive deep shade but grow slower (UMN). Gold types like 2 to 3 hours of morning sun, and blue types need more shade (UMN). Clemson says all do best with afternoon shade |
| Soil | Rich, moist, well drained and high in organic matter (UMN); slightly acidic (NC State). The Almanac gives pH 6.5 to 7.0 and says hostas dislike sitting in wet soil |
| Mulch | 2 to 4 in of organic mulch once the soil warms in late spring, kept off the crown (UMN). The Almanac notes mulch can hide slugs |
Watering, feeding and trimming
- Water steadily. About 1 inch a week, with deep, less frequent watering better than light sprinkles (UMN). Plants in sun, in dry shade or under shallow-rooted trees such as maples or spruce need more (UMN).
- Feed lightly, if at all. UMN suggests a soil test first; if fertilizer is needed, apply it in spring as leaves emerge and again before flowering, and stop after the end of July. Clemson uses a balanced slow-release fertilizer in early spring and warns against heavy rates.
- Flower stalks: UMN says not to let flowers set seed, since that takes energy from leaves and roots, so cut the stalks off after the blooms fade. The flowers do attract hummingbirds and bees (UMN), so you can enjoy them first.
- Sunscald: brown, scorched leaf surfaces or tips mean too much sun or too little water. Move the plant to more shade or water more (UMN).
Hostas in containers
UMN says a single hosta in a container is dramatic and pairs well with other foliage plants and annuals, but it needs regular watering. Small hostas also work as edging along paths (UMN), and NC State suggests dwarf and miniature types for small spaces. Pots dry out and get colder in winter than the ground does, so in cold zones move them to a sheltered spot for winter (GardenPal note).
Fall and winter
- Fall cleanup: rake up and remove dead leaves in late fall to cut down on disease and pests (UMN, Clemson). The Almanac cuts plants to the ground by early winter.
- Winter mulch: usually not needed, but add some for plants moved late in the season, after the ground has frozen about 3 inches deep (UMN). Pull it back from the crowns in spring to avoid crown rot (UMN).
- Dormancy: leaves die back once temperatures reach about 28°F (NC State).
Pests and problems
Slugs are the most common problem (Clemson), and deer, rabbits and voles can do real damage (Almanac, Clemson, NC State). Several viruses infect hostas, including Hosta virus X (HVX), which causes mottling, puckering and discolored veins; there is no cure, so infected plants should be dug out and thrown away, not composted (UW-Madison, Clemson). HVX spreads on tools and sap, often arriving on new plants that look healthy, so inspect plants before you buy and clean tools between plants (UW-Madison). Clemson also mentions foliar nematodes, which cause brown areas between leaf veins, and suggests buying in late summer or fall so you can check for them. Root and crown rot can occur in poorly drained soil (NC State).
Hostas around the vegetable garden
Hostas belong in the shady parts of a yard, not in a sunny vegetable bed. Because the ASPCA lists them as toxic to pets, plant them where dogs and cats don't graze (GardenPal suggestion). They make a good shade edging and partner well with other shade plants: NC State pairs bleeding heart with hostas, which fill in as the bleeding heart goes dormant, and our hellebore guide lists hostas among good hellebore partners. See when to plant bleeding hearts, when to plant astilbe and when to plant hellebores. Ferns and coral bells are classic hosta partners (Clemson, UVM); see when to plant ferns and when to plant coral bells.
Frequently asked questions
When is the best time to plant hostas?
Spring is generally best (UMN). Early fall also works (Clemson, Almanac).
How deep do you plant hostas?
With the crown even with the soil surface, or at the same depth as in the pot (UMN, Almanac).
How far apart should hostas be planted?
About 1 to 3 feet apart depending on the variety (Clemson).
Are hostas poisonous to dogs and cats?
Yes. The ASPCA lists hosta as toxic to dogs, cats and horses.
Can you plant hostas in summer?
Yes, but they need extra water until their roots are established (UMN, Almanac).
When should I divide hostas?
In early spring as the eyes emerge (UMN, Almanac), or in early fall (Clemson). Dividing is optional.
Enter your frost dates to time a spring or early-fall hosta planting.
Open itSources
- Virginia Cooperative Extension, "Companion Planting in Gardening" (SPES-620P)
- University of Maryland Extension, "Vegetable Succession and Companion Planting"
- Oregon State University Extension, "Companion Planting"
- Penn State Extension, "Herbs Make Good Plant Partners and Companions"
- University of Minnesota Extension, "Planting the vegetable garden"
- USDA Plant Hardiness Zone Map
- NOAA NCEI U.S. Climate Normals (frost/freeze data)
- University of Minnesota Extension, "Growing hostas"
- Clemson Cooperative Extension HGIC, "Hosta"
- NC State Extension Gardener Plant Toolbox, "Hosta"
- The Old Farmer's Almanac, "Hostas"
- UW-Madison Plant Disease Diagnostics Clinic, "Hosta virus X"
- Iowa State University Extension, "Which perennials can be divided in late summer?"
- ASPCA Animal Poison Control, "Hosta"
Pairings are summarized in our own words from extension-service guidance. Research support for many companion effects is limited, so treat them as good habits, not guarantees.