Growing lilies in USDA Zone 8 means gardening with mild winters and a long growing season, with a last frost in early spring and a first frost in late autumn. The average last spring frost falls around Mar 1–15 and the average first autumn frost around Nov 15–Dec 1, with average winter lows of 10 to 20°F. Those are USDA/NOAA zone averages, not promises for any one garden — check your local extension service. Lilies are a reliable choice in this zone, and this guide covers when to plant lilies in Zone 8, with the soil, spacing, sun, water and care it needs. Use the Zone 8 planting calendar to see what else to sow alongside it.
Zone 8 at a glance
USDA Zone 8 has average winter lows of 10 to 20°F, a last frost around Mar 1–15 and a first frost around Nov 15–Dec 1. Plan around those averages, not the calendar: a cold spring or a warm autumn can shift everything by a week or two, so check your local extension service for your area. Lilies are hardy to cold, so time planting around the frost dates first and everything else second.
| Detail | Zone 8 guidance |
|---|---|
| Average last spring frost | Mar 1–15 (average/range) |
| Average first autumn frost | Nov 15–Dec 1 (average/range) |
| Days to germination | 14–28 days |
| Days to maturity | 90–120 days |
| Sowing | Plant bulbs in spring (March to April) after the last frost, or in autumn (October) |
| Transplanting | Spring-planted bulbs go out after the average last frost (Mar 1–15) |
| Harvest | Flowers in summer, 90–120 days after spring planting |
| Sun | full sun |
| Soil pH | 6.0–7.0 |
| Spacing | 12–18 inches |
| Water needs | moderate |
When to plant lilies in Zone 8
Bulbs can be started in pots in late winter, or planted directly. Seeds germinate in 14–28 days, and the crop takes 90–120 days to maturity, so work the dates back from the frost averages: flowers in summer, 90–120 days after spring planting. If you are unsure of your own dates, the frost date calculator will work the timing out from your last frost. Frost dates are zone averages — check your local extension service before you commit to a date.
Starting lilies in Zone 8
Plant lily bulbs in spring (March to April), after the last frost, or in autumn (October) — spring planting is the simpler choice in Zone 8. Set bulbs pointy end up, deeper than you might expect, in soil that drains freely, and give tall varieties a stake at planting time. Lilies dislike being moved, so choose the spot carefully and leave them alone once planted.
Soil, spacing, sun and water
Lilies want full sun on their flowers and cool roots, so mulch the bed and plant low ground cover or shallow-rooted companions around their bases. Soil pH of 6.0–7.0 suits them, with plenty of compost dug in for moisture holding. Space bulbs 12–18 inches apart — they grow tall and need air around their stems. Space plants 12–18 inches apart — it is tempting to crowd plants in, but crowded plants stay small and invite disease, so measure the bed out before you plant. Lilies need moderate water: water deeply and less often rather than lightly every day, water at the base in the morning so leaves dry before night, and mulch to keep the soil evenly moist. Check the soil a finger's depth down and water when it feels dry there.
Companion planting
Good companions for lilies include lavender, marigolds, garlic, chives. The companion planting finder can suggest combinations for your whole bed. Related reading: Peonies. Avoid planting lilies where the same family (Liliaceae) grew last year.
Pests and problems
The common pests and problems to watch for with lilies are aphids, slugs, cutworms. Inspect plants regularly, especially the undersides of leaves, and act early: hand-pick larger pests, wash aphids off with a strong jet of water, and remove badly affected leaves rather than waiting for the problem to spread. Slugs can damage young shoots in spring, so check plants after rain. Aphids sometimes cluster on buds; wash them off with water. The main enemy in many areas is the red lily beetle, which chews leaves and buds — hand-pick beetles and larvae as soon as you see them, and check the undersides of leaves.
Harvest and storage
Cut lilies for the vase when the lowest bud is just opening, and leave at least a third of the stem and its leaves on the plant so the bulb is fed for next year. Remove the pollen anthers if you bring them indoors to avoid stains. After flowering, deadhead but leave the stems and leaves to die back naturally.
Making the most of Zone 8
Zone 8 lilies repay a little patience: spring-planted bulbs flower in summer, and the same bulbs return bigger each year if you leave the foliage alone after flowering. Mulch is the single most useful thing you can do for them — cool, moist roots and sunny tops. Keep a simple notebook of what you sowed, when it went out, and when it flowered or fruited — after one season you will have a record far more useful to your own garden than any general guide.
Related Zone 8 guides in this series: March in Zone 8 and Lilies in Zone 1.
Frequently asked questions
When should I plant lilies in Zone 8?
Work back from the average last frost around Mar 1–15: plant bulbs in spring (march to april) after the last frost, or in autumn (october). Check your local extension service — these are zone averages, not exact dates for your garden.
How long do lilies take to grow in Zone 8?
Seeds germinate in 14–28 days, and the crop takes 90–120 days to maturity. In Zone 8, cool soil can slow growth early in the season, so allow the longer end of the range.
Can I plant lilies in autumn in Zone 8?
Yes — autumn (October) planting works in Zone 8, and bulbs establish roots before winter. Spring planting (March to April) is equally good and simpler to time. Either way, plant in well-drained soil and check your local extension service if your winters are unusually wet.
What soil and spacing do lilies need in Zone 8?
Lilies need full sun and soil pH 6.0–7.0, spaced 12–18 inches apart. Dig in well-rotted compost, water deeply, mulch, and test your soil through your local extension service.