Starting SeedsApr 15, 2018 12:05PM ● By Patrick McGee
Growing produce is a great way to save money on groceries and promote healthy eating. Buying greenhouse-started plants is one option, but starting your own seedlings allows you to grow atypical plants at a fraction of the cost.
Springtime planting takes a little bit of foresight, so plan ahead. Seeds should be started six to eight weeks prior to planting in the ground. With Nebraska’s climate, seedlings will not survive in the winter cold and should be started indoors or with protection.
Dr. David Hibler, the owner of the Benson Plant Rescue, recommends starting your seeds in January or February. Hibler says that this will help you get your plants in the ground before the generally accepted frost-safe date of around May 4, noting that the date has been less consistent in recent years.
To start seedlings indoors, Hibler says you need three things: a light source, moisture, and a growing medium such as soil. He says kits are available, with the “72 slot” being a popular option. The 72 slot is a small greenhouse-like tray with subdivided slots for growing medium and seeds.
For the growing medium, expanding medium pellets are an easy option. Hibler recommends a lightweight organic seed-starting mix. Soil can be mixed with peat moss or vermiculite to lighten it. Hibler also recommends reusing seed trays and soils.
For lighting, Hibler recommends full-spectrum fluorescent lights. “Daylight” bulbs, he says, are often a fraction of the price of “grow lights” but contain the necessary spectrum. A brood light with a full-spectrum, compact fluorescent bulb also works well. He says LEDs are also available.
Hibler says that when the soil reaches around 64 degrees Fahrenheit and there is no risk of frost, seedlings can be planted. Perennials, he notes, can tolerate a little bit of frost.
John Porter, agriculture program coordinator with the University of Nebraska Agriculture School, lends a few supplementary suggestions. Porter says seeds need around 75-80 degrees Fahrenheit to germinate. Once they come up and have leaves on them, they need to be a bit cooler—60-65 degrees Fahrenheit—so they don’t get long and leggy. He notes that most seeds don’t need light to get started. He says they can be started on top of the refrigerator for warmth.
Porter also recommends sterile soil and sterilized containers. “There are some diseases that will kill the seedlings when they are very young,” he says. Porter also recommends using recycled containers for seedlings. They will need drain holes. He recommends cleaning them with a detergent and sterilizing with a 10 percent bleach solution.
Once the seeds germinate and have leaves, they should go into the potting soil. “Seeds have the nutrients to get [seedlings] into the first set of leaves; they don’t need nutrients until then,” Porter says.
As for lighting, Porter says commercial greenhouses use LEDs, but fluorescent bulbs also work. He notes that if full-spectrum bulbs are not available, a mix of warm and cool fluorescent bulbs contain enough of the light spectrum required for most seedlings. Porter recommends putting the lights as close to the seedlings as possible without causing damage to the plants.
Growing seedlings indoors is not an exact science to yield good results. If you need supplies, the Benson Plant Rescue has them for sale, or Hibler can steer you to the right place to find them. If you want to learn the science of starting seeds, Porter offers a course with the Douglas-Sarpy County Extension Office. Everything else about starting your own seeds and planting your garden is DIY. That is half the charm.
The Benson Plant Rescue is on Facebook at @bensonplantrescue and can be reached by e-mail at [email protected] Details on plant propagation classes with the Douglas-Sarpy County Extension Office are available at extension.unl.edu/statewide/douglas-sarpy or by e-mail at [email protected]
This article was printed in the March/April 2018 edition of OmahaHome.