Growing Indigenous Trees in Maine

Posted on

by Cassie Steele, Freelance Writer

Photo by Héctor Martínez

Beginning in January 2018, Maine’s Department of Agriculture, Conservation and Forestry adopted a new set of rules prohibiting the sale of invasive plants in Maine. The legislation is especially important for conserving the growth of native trees, which are vital to insect populations and regional forestry. For gardeners looking to incorporate more native tree species into their landscapes, it’s key to know how (and when) to plant Maine’s wide array of native trees species: as their survival directly impacts local plant and wildlife habitats.

What Not To Plant

First, it’s important to know the criteria for invasive species in Maine so you can determine which trees are likely hurting your local ecosystem. If you choose to remove invasive tree species already growing on your property, bring them to a local recycling center who will make use of the wood. Once you familiarize yourself with Maine’s native tree species, you can find many available for purchase at a local nursery. Typically, trees are sold as “container grown,” which offer the plant limited space for the roots to grow (thereby encouraging the roots to spread out).

How and When To Plant Native Trees

Container grown trees and shrubs are best planted in early spring or fall, so that there is enough time for roots to grow before the temperature drops in winter.  When planting, remember that roots grow outward more than downward: so don’t dig a hole too deep, or more than 1 foot longer than the length of the plant.  Native trees in Maine are already adapted to Maine’s weather and soil conditions, so it’s a good idea to avoid interfering with the soil.

Caring for Your New Native Tree

Once your tree has been planted, maintenance in the first three years is vital to ensuring healthy development. Be sure to regularly weed the areas around the tree roots and mulch the ground so that the soil is properly moistened. The best form of mulch to use for Maine’s native trees is organic matter, such as bark chips. Of course, it’s important to water thoroughly, but in the winter months, your tree will need less water to survive.

Ultimately, your landscape will be best served by cultivating an ecosystem that mirrors the species found in Maine’s wildlife, including native trees. With proper care, regional trees will flourish in your local garden while keeping local ecosystems intact and protecting Maine’s species.

Leave a Reply

Your email address will not be published. Required fields are marked *

Top

Lemon Queen Sunflowers - Helianthus annuus

Annual

 

Short Description

Beautiful butter yellow flowers blossom mid-summer to frost! Typically grow to more than 5 ft. tall. Expect 70 days to flower.

Growing Guidelines

  1. Around the last frost date, sow seeds directly into the soil.
  2. Plant seeds 1" deep and 6" apart.
  3. Water well after planting.
  4. Apply a 3"-4" layer of mulch to conserve water and keep down weeds.
  5. Thin seedlings to 1 ft. apart to allow 2 to 3 ft. between plants.

Care and Feeding
Plant in full sun. Sunflowers are drought-resistant, but they'll grow better if you water regularly from the time the flowers begin to develop until they're mature. Thriving in most soils, these flowers will become massive if given ample fertility, space and water. Harvest blossoms for continued flowering.

Need more information or gardening supplies? Contact your local independent garden center.

Calendula Mix-Calendula officinalis

 

Short Description

Fruition has hand-selected this variety to have a brilliant diversity of colors with dozens of gorgeous, petals on each blossom.

Growing Guidelines

Direct sow (recommended)

  1. After the last frost, sow directly outside in the garden.
  2. Plant seed 24 to 36 inches apart in all directions.

Transplant method

  1. A cool-season plant, calendula can be started indoors in flats, under grow lights 6-8 weeks before the last frost for early season flowering.
  2. Seeds germinate in 5-15 days.

Care and Feeding
Plant in full sun to partial shade. Easy to grow and remarkably drought tolerant, calendula also thrives in containers and will readily naturalize when let go to seed.

Transplanting Tips

  1. Purchase a good seed starting soil like Espoma Organic seed starting mix or Coast of Maine.
  2. Use a small greenhouse tray(tray with a clear plastic dome) to germinate your seeds.
  3. When it's time to transplant into the garden, use a fertilizer like Espoma Flower-tone or Espoma Plant-tone.

Need more information or gardening supplies? Contact your local independent garden center.

Purple Queen Anne's Lace

"Dara" Daucus carota

 

Short Description

Gorgeously laced 3-5" umbels in shades of burgundy, lilac, mauve & white on long, strong stems perfect for cutting, adored by pollinators. Related to our native carrot, Queen Anne's Lace.

Growing Guidelines

Direct sow (recommended)

  1. In early spring, after late frost, sow seeds directly in soil.
  2. Plant 1 seed 1/8" deep and 2" apart.
  3. Expect 2 weeks for germination.
  4. When seedlings are 2-3" tall, thin to 1 plant every 9-12".
  5. Support may be needed if fertility is high or if your garden is windy.

Transplant method

  1. Chill seed at 40 F 1-2 weeks prior to sowing 1/8" deep, 2 seeds per cell 4-5 weeks before planting out.
  2. Expect germination in 1-2 weeks.
  3. When first leaves appear, transplant into larger containers.
  4. Harden off & transplant with 9-12" between plants after last frost.

Care and Feeding
Plant in full sun. Expect 65-75 days to maturity. Dara has an exceptionally long vase life; harvest when 80% of an umbel's flowers are open & no pollen has shed. Enjoy 7-15 heads per plant on swaying 35-50" stalks.

Transplanting Tips

  1. Purchase a good seed starting soil like Espoma Organic seed starting mix or Coast of Maine.
  2. Use a small greenhouse tray(tray with a clear plastic dome) to germinate your seeds.
  3. When it's time to transplant into the garden, use a fertilizer like Espoma Flower-tone or Espoma Plant-tone.
Need more information or gardening supplies? Contact your local independent garden center.

Marigolds

Annual

Care and Feeding

Transplant Only: Sow 4 weeks before last frost shallowly, 2 seeds per cell and thin to 1, keeping soil surface moist until emergence. Transplant to larger containers when true leaves appear. Harden off and transplant outside when the danger of frost has passed with 12" between plants. Deadhead for blossoms all season.

  • Sowing Date: Indoors before last frost
  • Seed Depth: 1/4 inch
  • Days to Germination: 4-7 days at 75-80°F
  • Days to Maturity: 60
  • Plant spacing after thinning: 12 inches
  • Height: 12 inches

Need more information or gardening supplies? Contact your local independent garden center.

Organic Mexican Sunflower (Torch Tithonia)

Annual

Care and Feeding
Direct Seed (recommended): After final frost, sow every 8" and thin to one every ~2'. Light required to germ, so barely cover seed. Full sun is best. Any (even poor) soil is suitable. Harvest flowers when 90% open for bouquets.

Transplant: Sow indoors 2-3 weeks before last frost, transplanting after frost with spacing below.
 
  • Sowing Date: After frost; Late May- early June
  • Seed Depth: 1/2 inch
  • Days to Germination: 7-14 days
  • Days to Maturity: 85
  • Plant spacing after thinning: 2 feet
  • Height: 5-7 feet

Need more information or gardening supplies? Contact your local independent garden center.

Cosmos

Annual

Care and Feeding

Direct Seed (recommended): After last frost, shallowly sow 4 seeds/foot & thin to 1/foot when first true leaves appear. Wider spacing = thicker stronger stems.

Bouquets: harvest when petals first open. Deadhead for blooms all season.

Transplant: Shallowly sow 4 weeks before transplanting after last frost at below spacing. Transplant your cosmos for earlier blooms and more full-size plants per pack; direct sow for blooms throughout the season and simplicity of sowing.

  • Sowing Date: After frost, late May to early June 
  • Seed Depth: 1/4 inch
  • Days to Germination: 7-10
  • Days to Maturity: 65-70
  • Plant spacing after thinning: 18-24 inches
  • Height: 3-4 feet

Need more information or gardening supplies? Contact your local independent garden center.