Starting Seeds with Patience

Southwest Yard & Garden

by Dr. Marisa Thompson AND Dr. Curtis Smith (partial reprint!) 

Artichoke seedlings planted by Chuck Havlic and Mellene Pablo at the NMSU Agricultural Science Center at Los Lunas in 2020. Photo credit M. Thompson. 

 

Starting plants from seed can be confusing. Too little water, and they dry and die. Too much, and all of a sudden, you’re farming algae. Patience and attentiveness are required during this delicate phase of seedling growth, especially if some seeds are sprouting while others take their sweet time.

For more seed starting tips, check out:

1. The recorded webinar “Indoor Seed Starting” with NMSU Bernalillo County Extension Program Manager Nissa Patterson that's part of the Ready, Set, GROW! gardening series.
2. My recent article in Edible New Mexico Magazine: "Touch and Grow: Seed Starters"
3. NMSU Extension Guide H-220, “Starting Plants Early Outdoors” aces.nmsu.edu/pubs/_h/H220/
4. NMSU Extension Circular 457, “Home Vegetable Gardening in New Mexico” aces.nmsu.edu/pubs/_circulars/CR457.pdf
5. NMSU Extension Circular 457-B, “Growing Zones, Recommended Crop Varieties, and Planting and Harvesting Information for Home Vegetable Gardens in New Mexico” aces.nmsu.edu/pubs/_circulars/CR457B.pdf
6. NMSU Extension Guide H-112, “Seed Propagation of Plants” aces.nmsu.edu/pubs/_h/H112

I know it’s been warm out, but be patient transplanting outdoors too. Remember that your area's average last frost date is based on the average over a specific number of years and that the latest frost date on record might be a month or more after the average date. For example, according to spring freeze data posted by National Oceanic and Atmospheric Administration (NOAA) and the National National Weather Service (https://www.weather.gov/abq/springfreezetable), the last average frost date for Santa Rosa, NM is April 18, but the latest on record was May 19, 2000. And temps dropped to 28 degrees that night.

 

Don't let seeds dry when they are germinating!

Reprinted column from March 14, 2009 by former NMSU Extension Horticulture Specialist Dr. Curtis Smith.

Question: How critical is it to give native plant seeds a lot of water to get them to germinate? I planted some seeds of native wildflowers, watered them once, and only a few came up.

Answer: The time during which a seed is germinating is a critical period for moisture. If the seed begins to germinate and dries out, it will die. Some plants can survive on a single irrigation if the soil holds enough moisture and natural rainfall comes when needed. In very sandy soils that do not hold much water, the seeds can dry quickly and die. A clay soil will hold more moisture and give the seedling a better chance to establish.

Some seeds native to desert regions have a "chemical rain gauge" in the seed coat or fruit covering around the seed. This chemical prevents germination while it is present but is washed away if there is adequate moisture. The quantity of moisture required to wash this chemical away is the amount of moisture that is sufficient to allow the seed to germinate and grow. Some seeds may have more of this inhibitor so that they require more moisture, and others have less so that they can germinate more quickly. Those that germinate quickly are counting on another precipitation or irrigation event to sustain them. Those that have more chemical inhibitors are better prepared to grow if there is no new precipitation event in the near future. This chemical inhibition of germination is an insurance policy to ensure that at least a few of the seeds will germinate at the right time.

Our common garden flowers and vegetables often do not have these inhibitors. They were bred so that we could plant the seed and have uniform germination. Wildflower seeds may still exhibit germination spread over time because they may have these inhibitors. Knowing this helps you understand that consistent irrigation is necessary for many of the flowers and vegetables we plant.

 

 

For more gardening information, visit the NMSU Extension Urban Horticulture page at http://desertblooms.nmsu.edu/ and the NMSU Horticulture Publications page at http://aces.nmsu.edu/pubs/_h/. Find your local Cooperative Extension Office at https://aces.nmsu.edu/county/.

 

Marisa Y. Thompson, Ph.D., is the Extension Urban Horticulture Specialist in the Department of Extension Plant Sciences and is based at the New Mexico State University Agricultural Science Center at Los Lunas.