Local Tips for Raised Beds and Other Gardening Styles: Irrigation Timing, Salty Crusts, and Growing Garlic
Southwest Yard & Garden
by Dr. Marisa Thompson
Bernalillo County Cooperative Extension Agriculture Agent John Garlisch leads a “Summer Raised Bed Gardening” workshop in Albuquerque the first week of June. Photo credit M. Thompson.
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Questions:
What time of day should I water my raised bed garden? Why is water pooling on
the soil surface? When is the right time to pull garlic?
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Attendees of the “Summer Raised Bed Gardening” Workshop at the
Larry P. Abraham Agri-Nature Center in Los Ranchos de Albuquerque, hosted by
Bernalillo County Cooperative Extension Agriculture Agent John Garlisch
Answers:
Whether you’re gardening in raised beds or directly in the ground, deciding
what time of day to water is worth some discussion. If you were to Google that
question, you’ll find that watering in the morning is regarded as the best
practice by many gardening sites. This is a great example of how Googled
answers might steer readers in the wrong direction. The main reason for
watering in the morning in other areas of the country is that they are dealing
with a higher prevalence of fungal pathogens common in super-moist conditions
that are worsened by nighttime soaks. Watering in the evening or at night is
recommended by many local gardeners both because we have relatively fewer
fungal issues in our New Mexico soils and because so much water evaporates from
the soil surface during the day with our intense sun exposure and dry air. More
important than watering at a specific time of day is allowing soils to dry
slightly between waterings and taking care to apply water as efficiently as
possible.
Pooling
water on the soil surface could be a sign that there’s a salinity problem and a
crust has formed that impedes water movement into the root zone. Sometimes, but
not always, this salt crust is white and chalky. Salty crust sounds delicious
on a pizza, but it is bad news for roots. For a full description on why this is
a problem, check out the NMSU Extension Circular 656, “An Introduction to Soil
Salinity and Sodium Issues in New Mexico” (https://aces.nmsu.edu/pubs/_circulars/CR656/welcome.html).
The NMSU Learning Games Lab on the main campus in Las Cruces produces
educational, research-based games and media, including cute videos. Their short
cartoon video “Unavailability of Water in Saline Soils,” created in
collaboration with content experts Dr. Robert Flynn and Dr. April Ulery (who
also authored Circular 656), describes how salt can interfere with water uptake
by plant roots. It’s available on YouTube (https://www.youtube.com/watch?v=zJ_zi53UjF8&t=31s).
The Learning Games Lab studio production team is developing new materials on
water and how it is absorbed in the soil, so stay tuned!
The NMSU Learning Games Lab produced a short video describing why excess salts in the soil bind with water, making it harder for plant roots to absorb water (https://www.youtube.com/watch?v=zJ_zi53UjF8&t=31s). |
Now
on to the garlic question. For long-term storage, the right time to harvest
garlic is when the tops begin to brown and die down. More specifically, when
the older leaves have died, but the younger leaves are still partially green.
Workshop attendee and long-time Extension Master Gardener volunteer Bill Shen
explained why it’s a good time to pull your garlic when you see some brown and
some green leaves: that’s when it’s mature enough to dry and store well as
whole bulbs. If you wait too long, the bulbs fall apart in storage and cloves may
not last as long as they would when they are tightly assembled. On the other
hand, if you pick too early, drying and storing becomes risky and your garlic is
more likely to mold. For cooking fresh garlic, Shen says, by all means, harvest it
green and enjoy that freshness! It’s the long-term storage concerns that dictate
the perfect harvest window. If you were to follow a young leaf carefully down
into the mother bulb, you’d see that those leaves form the papery sheaths that
wrap and protect individual cloves. NMSU Extension Guide H-234, “Garlic
Production in New Mexico,” can be accessed at https://aces.nmsu.edu/pubs/_h/H234/welcome.html. (Fun fact: in Spanish, garlic cloves are called
“dientes de ajo” or garlic teeth).
Lavender plants are thriving in raised beds at the Larry P. Abraham Agri-Nature Center in Los Ranchos de Albuquerque. Photo credit M. Thompson |
Send
gardening questions to Southwest Yard and Garden -
Attn: Dr. Marisa Thompson at desertblooms@nmsu.edu,
or at the Desert
Blooms Facebook page (@NMDesertBlooms)
Please
copy your County
Extension Agent and indicate your county of residence when you
submit your question!
For
more gardening information, visit the NMSU Extension Horticulture page
at Desert
Blooms.
Thank you SO much for this information...coming from Ohio, I desperately need helpful information with growing food in the high desert of T or C !
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