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Planting Seedlings for Arbor Day

Update to our seedling giveaway event:

Thank you for your participation in our 2018 Arbor Day seedling giveaway! The response was overwhelmingly enthusiastic. We encourage you to send us photos of your planting projects at photos@mgcmail.com!

As a garden center, Arbor Day is one of our favorite holidays. Each year we celebrate by encouraging our friends, family and customers to cultivate and care for our environment by planting trees in their gardens.

This year, we are excited to take this celebration a step further by actually giving away native white dogwood seedlings for families to plant! Take on a planting project with your children, your family, or your friends this year to celebrate the environment and add a beautiful new plant to your home and garden. As the white dogwood seedlings grow, they will improve the air quality of our region, create habitats for local wildlife, and serve as a food source for birds, pollinators and other animals.

How to Plant a Seedling

Seedlings can be planted in the ground or in a container. It is best to plant them within 24 hours of bringing it home, but if you cannot do so, keep the roots of your tree moist. Wrap your seedling in plastic and store it in a cool, dark spot between 40 degrees and 60 degrees, then plant your seedling as soon as possible.

Container Planting

Supplies:

  • Container (At least 1 gallon in size and 6-7 inches deep)
  • Water soluble or slow release fertilizer
  • Merrifield Potting Mix

Steps:

  1. Select a container with a drainage hole that is slightly larger than the root system in depth and width (a one-gallon pot that is 6-7 in. deep is generally enough to maintain the growth of the seedling for one year)
  2. Soak your seedling’s roots in a bucket or bowl of water for several hours.
  3. Top soil and garden soil are generally too heavy for seedlings. Use Merrifield Potting Mix to get your seedling off to a strong start.
  4. Place the seedling in the container, and fill with Merrifield Potting Mix to the top of the point where the roots begin.
  5. If your potting mix does not contain a slow release fertilizer, apply a slow release fertilizer at half the concentration recommended for house plants. Re-apply once per month.
  6. Water your container thoroughly. Test the soil for moisture regularly and water as needed when the soil is dry.
  7. You can keep your tree in a one-gallon container in a spot with full sun to part shade for approximately one year before transferring it to the ground.

Planting in the ground

Supplies:

  • Shovel
  • Bucket or bowl
  • Mulch
  • Garden hose
  • Watering Wand
  • Merrifield Planting Mix

Steps:

  1. Select a location for your tree. Ideally, it should be sheltered from weather, wildlife and lawn mowers for the first few years, then transplanted to another location. If you will be planting it in the spot you intend to be its permanent location, place a fence around the tree to protect it from lawn mowers and foraging wildlife.
  2. Soak your seedling’s roots in a bucket or bowl of water for several hours.
  3. Dig a hole as deep as the depth of the roots for your seedling, allowing plenty of room around it for the roots to grow and spread out.
  4. Place your seedling in the hole, making sure that the top of the roots is at the level of the soil line.
  5. Mix your existing soil with Merrifield Planting Mix or other soil conditioner and use this mixture to backfill the hole.
  6. Apply a water-soluble fertilizer at half the concentration recommended for house plants once per month.
  7. Water thoroughly and deeply with your watering wand, saturating the root zone. Water deeply whenever the soil is dry to encourage deep roots.
  8. After planting, mulch 2-3 inches deep around the seedling to retain soil temperature and moisture. Leave unmulched soil around the trunk.

Celebrating Arbor Day

Looking to celebrate Arbor Day with a planting project, but prefer to plant a tree larger than a seedling?

Visit our post on trees and shrubs that grow well in our region.

Starting from seed

Louis Ratchford, Merrifield Plant Specialist

Growing your own plants from seed can be very rewarding! You can get your hands into the dirt in the middle of winter, and enjoy the fruits of your labor when the weather warms.

Step One: Plan your garden

The key to determining when to start your seeds is identifying the average last frost date in your area. You can work backward from this date to determine when to begin your seeds indoors.

To begin, select the crops you’d like to start from seed. Make sure you select seeds that can be sown indoors (some veggies, such as beans, prefer to be sown directly in the ground outdoors as they germinate quickly). I’m beginning with a few flowers, veggies and herbs that tend to be easy to start from seed indoors, such as zinnias, marigolds, tomatoes and peppers.

Step Two: Collect your supplies

You’ll need:
• Containers and trays
• Plastic lid or plastic wrap
• Labeling supplies
• Watering mister
• Seed packets
• A high-quality seed starting media
• Grow light, if necessary

There are many different containers you can use to start seeds, such as seed trays, biodegradable pots, yogurt containers or milk or egg cartons. If you select an item from home, make sure to clean it thoroughly and drill holes in the bottom for drainage. We decided to use seed starting plastic containers and trays as they’re already cleaned, pre-drilled and ready to go.

If you’re using seed trays, pick up one of the plastic covers. This will help retain moisture and increase the humidity during germination. If you’re using at-home containers, plastic wrap can do the trick.

It’s important to use a seed-starting media as it’s lose and lightweight and holds moisture to keep your seeds consistently moist. Avoid using soil from your garden or potting soil as it’s too heavy for delicate seeds.

Step Three: Sow your seeds

Place your seed starting medium into a bucket and add water to moisten it until it’s thoroughly damp. The goal is to get it crumbly, not soaking wet.

Fill your seed trays with the soil, pressing it down to eliminate air gaps.

Insert your finger or a pencil into the soil at a depth of two to three times the thickness of the seed in a few places in each cell to make holes. Place one seed in each hole.

Once you place all of your seeds, cover them with the seed starting media, and then mist with water. As soon as you finish one type of seed, label the tray with the plant name and date. There is nothing more frustrating than forgetting what you planted where and when!

Cover your tray with the plastic cover or plastic wrap and set it under the light source. I don’t have a strong south or east facing window that will naturally produce enough light during the day so I’m using a grow light. For the best growth, seedlings need at least 12 hours of light per day. If seedlings don’t get enough sun, they can grow leggy and weak.

Note: Not all seeds need to be covered with the seed starting media to germinate. Check the seed packet to see how deep to cover your seeds or if your seeds can grow simply on the surface. Whether you cover the seedling with the medium or not, all seeds need direct contact with the seed starting media to germinate.

Step Four: Keep them well-lit and watered

If you’re using a grow light, place it a few inches above the seeds and raise it as they mature. Keep the soil evenly moist by using a mister. Seeds are very sensitive to over and under watering. Heavy watering, with a watering can for example, can disturb the seedling. We recommend checking your seeds for moisture at least once a day.

Seeds germinate when the soil temperature is between 65 and 75 degrees F. If you’re starting your seedlings in a garage, potting shed or basement that might not be temperature controlled, use a heating mat or space heater to keep the tray warm. If you’re using one of these heat sources, check the moisture level more frequently as they can dry out the soil more quickly.

Once your seeds sprout, remove the plastic cover and heating source, if used, and set them aside for next time.

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