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Starting plants from seed is a rewarding way to jump-start the gardening season, and it’s easier than most people think! Whether you’re growing vegetables, herbs, or flowers, seed starting is a simple project the whole family can enjoy while dreaming of spring.

With the right supplies and a little patience, you’ll be well on your way to healthy seedlings ready for the garden.

What You’ll Need

Before you begin, gather these seed-starting essentials:

Seed-Starting Containers

Cell-based trays are the most efficient and space-saving option. Those small 1” x 1” cells may look tiny, but they provide all the space a seed needs to germinate and grow strong roots early on.

Seed-Starting Mix

Choose a lightweight, soilless potting mix specifically designed for seeds. These mixes drain well and encourage healthy root development—garden soil or heavy potting soil is too dense for young seedlings.

Seeds

Pick your favorites! Sunnyside Gardens carries a large variety of seeds that grow well in our climate, from vegetables and herbs to annuals and perennials.

Labels or Markers

Even the most organized gardeners forget what’s been planted. Label everything—future you will be grateful!

Plastic Cover or Dome

Clear plastic helps maintain warmth and humidity during germination.

Light Source

A sunny window works well. For gardeners who want stronger, sturdier seedlings, grow lights are a great option.

How to Plant Your Seeds

1. Prepare the Soil

Lightly dampen your seed-starting mix before filling trays. The soil should be moist but not dripping wet.

2. Fill Containers

Fill trays about two-thirds full. Gently tap the tray on a table to settle the soil—do not pack it down. Air pockets are important for healthy roots.

3. Plant the Seeds

• Small seeds can be sprinkled on the surface
• Larger seeds should be planted individually
• Always check seed packet instructions—some seeds need light to germinate and should barely be covered

Planting a few seeds per cell is recommended since not all seeds germinate.

4. Cover Lightly & Water

Add a thin layer of soil if needed, then gently water to ensure good seed-to-soil contact.

Germination Tips

• Cover trays with clear plastic to hold in warmth and humidity
• Ideal germination temperature is 65–70°F
• Seeds do not need light until they sprout
• A warm spot like the top of a refrigerator works well

Once seedlings emerge, remove the plastic and move trays to bright, indirect light.

Thinning Seedlings

If multiple seedlings sprout in one cell, remove the weakest ones. This gives the strongest plant room to grow. Extra seedlings can sometimes be transplanted into empty cells or pots.

Hardening Off: Preparing for the Outdoors

Before planting outside, seedlings need time to adjust.

• Start by placing plants outdoors in a shaded spot for a few hours
• Gradually increase outdoor exposure over several days
• Bring plants inside if temperatures dip

Once weather conditions are right, plant in the garden, water well, and avoid planting during the hottest part of the day.

Ready to Get Growing?

Seed starting is a simple, satisfying way to welcome the gardening season early. Stop by Sunnyside Gardens for seeds, soil, trays, grow lights, and expert advice to help your seedlings thrive—from the first sprout to planting day.