Washington’s maritime climate allows for successful cultivation of lavender and calendula as medicinal plants. If you’re searching for the best medicinal plants in washington to grow in your garden, you’ve come to the right place. The Pacific Northwest offers unique growing conditions that are perfect for a variety of healing herbs. This guide will walk you through the top choices, how to grow them, and how to use them safely.
Growing your own medicine is rewarding. You get fresh, potent herbs right from your backyard. Washington’s mild winters and moderate summers create an ideal environment for many medicinal species. Let’s explore the plants that thrive here and offer real health benefits.
Best Medicinal Plants In Washington
This section covers the top medicinal plants that grow well in Washington state. Each plant is chosen for its hardiness, ease of care, and proven medicinal uses. You’ll find detailed information on planting, harvesting, and preparing these herbs.
Lavender
Lavender is a top choice for Washington gardens. It loves the well-drained soil and full sun. English lavender varieties are especially hardy here.
- Growing conditions: Full sun, well-drained soil, pH 6.5-7.5
- Planting time: Spring after last frost
- Harvest: When buds first open, cut stems in morning
- Uses: Calming tea, sleep sachets, infused oil for headaches
To dry lavender, hang small bundles upside down in a dark, airy space. Store dried buds in airtight jars. Use them for tea or bath blends.
Calendula
Calendula, or pot marigold, is a workhorse in the medicinal garden. It grows easily from seed and blooms from summer until frost.
- Growing conditions: Full sun to partial shade, average soil
- Planting time: Direct sow after last frost
- Harvest: Pick flowers fully open, remove green base
- Uses: Skin healing salves, infused oil for cuts and rashes
Make a simple calendula oil by covering dried petals with olive oil. Let it sit in a sunny window for two weeks. Strain and use on minor skin irritations.
Echinacea
Echinacea is a native prairie plant that adapts well to Washington gardens. It’s a powerful immune booster.
- Growing conditions: Full sun, well-drained soil
- Planting time: Spring or fall from seed or transplants
- Harvest: Roots in fall after two years, flowers in summer
- Uses: Tincture for colds, tea for immune support
To make a tincture, chop fresh echinacea root and cover with vodka. Let it steep for 4-6 weeks, shaking daily. Strain and take at first sign of illness.
Lemon Balm
Lemon balm is a hardy perennial that spreads easily. It’s excellent for stress and digestion.
- Growing conditions: Partial shade to full sun, moist soil
- Planting time: Spring or fall
- Harvest: Before flowering for best flavor
- Uses: Calming tea, tincture for anxiety, topical for cold sores
Fresh lemon balm leaves make a refreshing tea. Steep a handful of leaves in hot water for 10 minutes. Add honey if desired.
Yarrow
Yarrow is a tough, drought-tolerant plant that thrives in Washington’s drier areas. It’s a first-aid essential.
- Growing conditions: Full sun, poor to average soil
- Planting time: Spring from seed or divisions
- Harvest: Flowers and leaves in summer
- Uses: Wound poultice, fever tea, cold remedy
For a wound poultice, crush fresh yarrow leaves and apply directly to a cut. It helps stop bleeding and prevents infection.
St. John’s Wort
This plant is known for its mood-boosting properties. It grows well in Washington’s open fields and roadsides.
- Growing conditions: Full sun to partial shade, any soil
- Planting time: Spring or fall
- Harvest: Flowers in mid-summer when buds are bright yellow
- Uses: Infused oil for nerve pain, tincture for mild depression
Caution: St. John’s Wort can interact with many medications. Consult your doctor before using it internally.
Chamomile
German chamomile is an annual that self-seeds readily. It’s gentle and safe for children.
- Growing conditions: Full sun to partial shade, well-drained soil
- Planting time: Direct sow in spring
- Harvest: When petals begin to fold back
- Uses: Tea for sleep, digestive aid, skin wash
Dry chamomile flowers on a screen in a warm, dark place. Store in a glass jar for up to a year.
Nettle
Stinging nettle is a nutrient-rich powerhouse. It grows wild in Washington’s moist areas.
- Growing conditions: Partial shade, rich moist soil
- Planting time: Spring from seed or root divisions
- Harvest: Young tops in spring before flowering
- Uses: Nutritive tea, cooked greens, tincture for allergies
Wear gloves when harvesting nettle. The sting disappears once the leaves are cooked or dried.
Valerian
Valerian is a classic sleep aid. It grows well in Washington’s cooler climates.
- Growing conditions: Full sun to partial shade, moist soil
- Planting time: Spring or fall
- Harvest: Roots in fall after two years
- Uses: Tincture for insomnia, tea for anxiety
Valerian root has a strong, earthy smell. Some people find it unpleasant, but it works well for sleep.
Mullein
Mullein is a biennial that grows tall stalks. It’s excellent for respiratory health.
- Growing conditions: Full sun, well-drained soil
- Planting time: Spring or fall
- Harvest: Leaves in first year, flowers in second year
- Uses: Tea for coughs, infused oil for earaches
To make mullein tea, steep dried leaves in hot water for 10 minutes. Strain through a coffee filter to remove tiny hairs.
Growing Tips For Washington Gardens
Washington’s climate varies from the wet west side to the dry east side. Adjust your planting based on your specific region.
Western Washington
This area has mild, wet winters and cool summers. Focus on plants that tolerate moisture.
- Plant in raised beds to improve drainage
- Use mulch to prevent soil splash on leaves
- Choose varieties resistant to powdery mildew
- Harvest on dry days to prevent mold
Eastern Washington
This region has hotter summers and colder winters. Irrigation is often needed.
- Water deeply but less frequently
- Use drip irrigation to keep leaves dry
- Plant in spring after soil warms
- Protect tender perennials with winter mulch
Soil Preparation
Most medicinal plants prefer well-drained soil. Test your soil pH and amend as needed.
- Remove weeds and rocks from the planting area
- Add compost or aged manure
- Work soil to a depth of 12 inches
- Rake smooth and water before planting
Harvesting And Storing Medicinal Plants
Proper harvesting ensures you get the most potent medicine from your plants. Timing and technique matter.
When To Harvest
Harvest at the peak of the plant’s medicinal content. This is usually just before or during flowering.
- Leaves: Before flowering for best flavor
- Flowers: When fully open but not faded
- Roots: In fall after the plant has died back
- Seeds: When they are ripe but before they scatter
Drying Methods
Drying concentrates the medicinal properties. Use one of these methods.
- Air drying: Hang small bundles in a dark, ventilated space
- Screen drying: Spread plant parts on a mesh screen
- Dehydrator: Use low heat (95-105°F) for faster drying
- Oven drying: Use the lowest setting with door slightly open
Storage Tips
Store dried herbs in a cool, dark place. Use airtight containers to preserve potency.
- Glass jars with tight lids work best
- Label with plant name and harvest date
- Keep away from heat and light
- Use within one year for best results
Making Simple Herbal Preparations
You don’t need expensive equipment to make your own medicine. Start with these basic preparations.
Herbal Tea
The simplest way to use medicinal plants. Use 1-2 teaspoons of dried herb per cup of water.
- Bring water to a boil
- Pour over herb in a cup or teapot
- Cover and steep for 10-15 minutes
- Strain and drink warm
Infused Oil
Use infused oils for salves and massage blends. They extract fat-soluble compounds.
- Fill a jar halfway with dried herb
- Cover completely with olive or jojoba oil
- Place in a sunny window for 2-4 weeks
- Strain through cheesecloth and bottle
Simple Salve
A salve is an infused oil thickened with beeswax. It’s easy to make.
- Melt 1 ounce beeswax in a double boiler
- Add 1 cup infused oil and stir
- Pour into small tins or jars
- Let cool completely before using
Safety Considerations
Medicinal plants are powerful. Use them with respect and caution.
Identification
Always positively identify a plant before using it. Some look-alikes are toxic.
- Use a field guide or reputable app
- Learn from an experienced forager
- Start with one or two plants at a time
- Never use a plant if you are unsure
Dosage
Start with small amounts to see how your body reacts. Increase gradually if needed.
- Follow recommended dosages from reliable sources
- Pay attention to how you feel
- Stop use if you experience side effects
- Consult a healthcare provider for serious conditions
Contraindications
Some herbs interact with medications or are unsafe during pregnancy.
- St. John’s Wort interacts with antidepressants and birth control
- Echinacea may not be safe for autoimmune conditions
- Valerian can intensify sedative medications
- Nettle should be avoided during early pregnancy
Seasonal Planting Guide For Washington
Plan your medicinal garden according to the seasons. This ensures a steady supply of fresh herbs.
Spring Planting
Start seeds indoors 6-8 weeks before last frost. Transplant after danger of frost passes.
- Calendula
- Chamomile
- Lemon balm
- Echinacea
Summer Care
Water deeply during dry spells. Mulch to retain moisture and suppress weeds.
- Harvest flowers regularly to encourage more blooms
- Pinch back lemon balm to keep it bushy
- Divide yarrow every 2-3 years
- Watch for pests like aphids and slugs
Fall Harvest
Dig roots after the first frost. Dry and store for winter use.
- Valerian root
- Echinacea root
- Dandelion root
- Burdock root
Winter Preparation
Protect perennial plants with mulch. Plan next year’s garden.
- Cut back dead foliage
- Add a layer of straw or leaves
- Order seeds for spring
- Clean and organize your drying equipment
Frequently Asked Questions
What are the easiest medicinal plants to grow in Washington?
Lavender, calendula, and lemon balm are very easy. They require minimal care and thrive in Washington’s climate. Start with these if you are new to medicinal gardening.
Can I grow medicinal plants in containers in Washington?
Yes, many medicinal plants grow well in containers. Lavender, chamomile, and lemon balm are good choices. Use pots with drainage holes and quality potting soil. Move containers to sheltered spots during heavy rain.
When is the best time to harvest medicinal plants in Washington?
Harvest most aerial parts (leaves and flowers) in late spring to early summer. Roots are best dug in fall after the plant has died back. Harvest on a dry morning after the dew has evaporated.
Are there any medicinal plants that are invasive in Washington?
Yes, some medicinal plants can become invasive. Lemon balm and St. John’s Wort spread aggressively. Plant them in contained areas or remove flowers before they seed. Check with your local extension office for invasive species in your area.
How do I dry medicinal plants without a dehydrator in Washington’s humid climate?
Use a well-ventilated indoor space. Hang small bundles upside down in a dark room with good air flow. Use a fan to circulate air. Check for mold regularly and discard any affected material.
Growing your own medicinal plants in Washington is a rewarding experience. You get fresh, potent herbs while connecting with nature. Start with a few easy plants and expand as you learn. Always research each plant thoroughly before using it medicinally. With proper care and knowledge, your garden can become a source of natural healing for years to come.