Gardening with foxgloves begins with timing their planting to match their biennial growth cycle. Knowing when to plant foxglove plants is the key to enjoying their towering spires of bell-shaped flowers. Get the timing right, and you will have a stunning display that self-seeds for years.
Foxgloves are not fussy, but they do have a specific life cycle. Most are biennials, meaning they grow leaves the first year and bloom the second. A few are short-lived perennials. This guide will walk you through the best planting times for seeds, seedlings, and potted plants.
When To Plant Foxglove Plants
The best time to plant foxgloves depends on your climate and the type of plant you have. For seeds, aim for late spring to early summer. For nursery-grown plants, early spring or early autumn works best. Let’s break it down by season.
Spring Planting For Foxgloves
Spring is ideal for planting foxglove seedlings or potted plants. Wait until the last frost has passed. The soil should be workable and not waterlogged.
- Best for: Nursery transplants and young plants.
- Timing: After the last spring frost, typically March to May in temperate zones.
- Why: Plants have the whole growing season to establish roots before winter.
If you plant in spring, your foxgloves will likely bloom the following year. This is perfect if you want flowers in the second season.
Autumn Planting For Foxgloves
Autumn is another excellent window. Planting in early fall gives roots time to settle before the ground freezes. This works well in mild climates.
- Best for: Established potted plants or divisions.
- Timing: September to October, at least 6 weeks before the first hard frost.
- Why: Cool soil and rain help roots grow without heat stress.
Autumn-planted foxgloves often bloom earlier the next spring. They have a head start on growth.
Summer Planting For Foxglove Seeds
If you are starting from seed, summer is your friend. Foxglove seeds need warmth to germinate. Sow them directly in the garden or in trays.
- Best for: Direct sowing or starting seeds indoors.
- Timing: June to July for direct sowing. Start indoors in May.
- Why: Seeds germinate quickly in warm soil, and seedlings grow strong before winter.
Sow seeds on the surface of moist soil. Do not cover them deeply; they need light to germinate. Keep the soil damp until sprouts appear.
Understanding Foxglove Growth Cycles
Foxgloves are mostly biennials. This means they live for two years. In the first year, they form a rosette of leaves close to the ground. In the second year, they send up a tall flower spike.
Some varieties, like Digitalis purpurea, are true biennials. Others, like Digitalis grandiflora, are short-lived perennials that bloom for several years. Knowing which type you have helps with planting timing.
First Year: Leaf Growth
After planting seeds or transplants, the plant focuses on leaf production. The leaves gather energy for next year’s bloom. Do not expect flowers in the first year.
- Rosette of large, fuzzy leaves.
- Root system expands.
- Plant stores energy in the crown.
Be patient. The first year is all about building a strong foundation.
Second Year: Flowering And Seeding
In the second year, the plant shoots up a tall stem. It can reach 2 to 5 feet tall. Bell-shaped flowers appear in late spring to early summer.
- Flower colors: pink, purple, white, yellow.
- Blooms last 4 to 6 weeks.
- After flowering, the plant sets seed and often dies.
Let some flowers go to seed if you want self-sown plants. Foxgloves are prolific self-seeders.
Best Planting Times By Climate Zone
Your local climate changes the ideal planting window. Here is a quick guide for different zones.
Cool Climates (Zones 3-5)
In cold areas, plant in late spring after frost. Autumn planting is risky because young plants may not survive harsh winters.
- Spring: May to June.
- Autumn: Not recommended unless you have a cold frame.
- Seeds: Sow indoors in early spring, transplant after frost.
Temperate Climates (Zones 6-8)
These zones are ideal for foxgloves. You can plant in both spring and autumn.
- Spring: March to April.
- Autumn: September to October.
- Seeds: Direct sow in June or July.
Warm Climates (Zones 9-10)
Foxgloves struggle in intense heat. Plant in autumn for winter blooms. Provide afternoon shade.
- Autumn: October to November.
- Spring: February to March, but blooms may be short.
- Seeds: Sow in early autumn.
Step-By-Step Planting Guide
Follow these steps for successful planting. The process is simple but requires attention to detail.
- Choose a location: Partial shade is best. Full sun works in cool climates.
- Prepare the soil: Foxgloves like rich, well-draining soil. Add compost if needed.
- Dig a hole: Make it twice as wide as the root ball.
- Place the plant: Set it at the same depth as in the pot.
- Backfill and water: Gently firm soil around roots. Water thoroughly.
- Mulch: Add a 2-inch layer of organic mulch to retain moisture.
Space plants 12 to 18 inches apart. This allows air circulation and reduces disease.
Planting Foxglove Seeds Directly
Direct sowing is easy. Scatter seeds on prepared soil in summer. Press them lightly into the surface.
- Do not bury seeds; they need light.
- Keep soil consistently moist.
- Thin seedlings to 12 inches apart once they have two true leaves.
Seeds germinate in 14 to 21 days. Be patient and keep weeds away.
Planting Potted Foxgloves
Nursery plants are ready to go. Remove them from the pot gently. Loosen any circling roots.
- Water the plant well before transplanting.
- Plant at the same depth as in the container.
- Water deeply after planting.
Potted plants establish faster than seeds. They are a good choice if you want quicker results.
Common Mistakes To Avoid
Even experienced gardeners make errors. Here are pitfalls to sidestep.
- Planting too deep: Crown rot can occur if the plant is buried.
- Overwatering: Foxgloves dislike soggy soil. Let the top inch dry out.
- Planting in full shade: They need some sun for strong stems.
- Forgetting to deadhead: Remove spent flowers to encourage more blooms or let seeds form.
Avoid these and your plants will thrive.
Caring For Foxgloves After Planting
Once planted, foxgloves need minimal care. Water during dry spells. Fertilize lightly in spring.
Watering Needs
Foxgloves like even moisture. Water deeply once a week if rain is scarce. Mulch helps retain moisture.
- Check soil 2 inches down. If dry, water.
- Avoid overhead watering to prevent leaf diseases.
Fertilizing
Use a balanced fertilizer in early spring. Too much nitrogen leads to lush leaves but fewer flowers.
- Apply a 10-10-10 fertilizer at half strength.
- Compost tea is a good organic option.
Staking Tall Varieties
Some foxgloves grow very tall. Stake them to prevent flopping. Use bamboo canes or plant supports.
- Install stakes early in the season.
- Tie stems loosely with soft twine.
Propagation And Self-Seeding
Foxgloves are generous self-seeders. Let some flowers go to seed for next year’s plants.
Collecting Seeds
Harvest seeds when the seed pods turn brown. Shake them into a paper bag. Store in a cool, dry place.
- Sow seeds the following summer.
- Seeds remain viable for 2 to 3 years.
Dividing Perennial Varieties
Short-lived perennials can be divided in early spring. Dig up the clump and separate it into sections.
- Each division should have roots and leaves.
- Replant immediately and water well.
Pests And Diseases
Foxgloves are generally pest-free. But watch for a few issues.
- Aphids: Spray with water or insecticidal soap.
- Slugs and snails: Use beer traps or diatomaceous earth.
- Powdery mildew: Improve air circulation. Avoid wet leaves.
Most problems are preventable with good spacing and watering.
Design Tips For Foxgloves
Foxgloves add vertical interest to gardens. Plant them in groups for the best effect.
- Use them in cottage gardens, borders, or woodland settings.
- Pair with roses, delphiniums, or ferns.
- Plant in drifts for a natural look.
They also make excellent cut flowers. Remove the central spike after blooming for side shoots.
Frequently Asked Questions
Can I plant foxglove plants in winter?
Winter planting is not recommended. The ground is often frozen or too wet. Wait for spring or autumn.
How long does it take for foxglove seeds to bloom?
From seed, expect blooms in the second year. Some perennial types may bloom in the first year if started early indoors.
Do foxgloves need full sun?
They prefer partial shade but tolerate full sun in cool climates. Too much sun can cause leaf scorch.
What is the best month to plant foxglove seeds?
June or July is ideal for direct sowing. This gives seedlings time to grow before winter.
Are foxgloves toxic to pets?
Yes, all parts of the plant are toxic if ingested. Keep them away from curious dogs and cats.
Final Thoughts On Planting Foxgloves
Timing is everything with foxgloves. Plant seeds in summer for next year’s blooms. Set out transplants in spring or autumn. Your garden will reward you with stately towers of color.
Remember to let some plants self-seed. This creates a natural, ever-renewing display. With the right timing, you will have foxgloves for years to come.
Now you know exactly when to plant foxglove plants. Get out there and start gardening. Your future blooms are worth the wait.