Crop Comments: Free Poor Man’s Fertilizer

According to the American Meteorological Society’s Glossary, “Spring snow, also called corn snow or granular snow, is a coarse granular, wet snow, resembling finely chopped melted ice.”

Wet snow falling on tall, sturdy trees can break branches; the problem is even worse on immature trees. With lanky limbs and small crowns, they are either broken by snow loads or bent over so far that they never right themselves. Smaller trees, including saplings, are usually supple enough to rebound from snow piling up on tiny branches.

In March, much of the Northeast experienced heavy snow, though not nearly as severe as what took place a year ago. Still, a lot of branches weakened in our front yard, both coniferous and deciduous. Mercifully, few of those trees lost any branches (thus far).

Peter Wohlleben, professional forester and science writer in Germany, explained how snow loads can seriously harm trees. I’ll quote from his book, “The Secret Life of Trees” – “The pressure from above is simply too great. Such breakdowns mostly happen in the months of March and April, when the snow is transformed from feather-light fluff to dead weight.”

He estimates the point where snow becomes dangerous by analyzing the clusters of falling flakes. When clusters are about the size of a quarter, the tree’s safety situation becomes critical. This snowflake physical condition is a trait of wet snow, which holds a lot of water and is very sticky (making great snowballs). Rather than falling through tree branches, such wet snow adheres to them, creating thick, heavy layers.

Some refer to this dense, soggy gift of nature as “heart attack snow.” But it still offers some pluses: old-timers call spring snow “poor man’s fertilizer.” This is because snow, like rain, contains nitrogen (N) as well as minute amounts of phosphorus (P) and sulfur (S). The wetter snow washes these elements out of the atmosphere, depositing them on our fields, yards and gardens.

Research shows that the airborne presence of these nutrients has been increased via the byproducts of industrialization (emissions). Still, these are plant nutrients, free to crop growers.

Atmospheric S has decreased in recent years, due mostly to the effectiveness of the Clean Air Act. Earth’s atmosphere is roughly 78% N, but that N is relatively insoluble in its couplet (N2) form. Pollutants like nitrous oxide (a greenhouse gas) merge much more readily with snow, and even water, than S does.

According to scientific field tests, the most amount of N accompanying precipitation each year ranges between 2 and 12 lbs./acre. Thus, an average value of 7 lbs. is presumed for soil nutrient calculations. Scientists believe that snowflakes absorb more N than raindrops do.

Because snowflakes are much more crystalline in structure than water is, they tend to combine more readily with airborne chemicals.

Just how much N/acre is provided by snowfall depends on location and annual snow accumulation. Our average annual N deposit of 7 lbs. doesn’t seem like much compared to N applications exceeding 100 lbs. (common on each corn acre). But the key word is “free,” making this source of N a pleasant side benefit (assuming that not too many tree branches break).

While rain and lightning also deliver N, snow boasts several agronomic advantages over the other two free sources. First, snow stays around for a while, liberating its nutrients in a slow-release manner. Snow helps insulate plants from temperature fluctuations, which can cause heaving and related problems due to freezing and thawing. Snow makes small plants like strawberries less visible to hungry critters. Snow helps prevent plant growth from starting too early. And lastly, snow, unlike heavy rainfall, doesn’t leach nutrients away from plant roots.

Residents of Canada’s Maritime provinces (which many consider an extension of our Northeast) divide spring snowfalls into three categories. First comes the “robin’s snow,” occurring just after robins migrate back from their southern winter habitat. Then the “smelt snow” takes place, when the smelt are “running” in the rivers near the coast. Lastly is “poor man’s fertilizer,” delivered by the snow that lands on freshly plowed land in early spring.

But the economic benefit of snow-borne free N becomes even more pronounced when framed by the chaotic crop nutrient supply/demand situation presently confronting growers.

With assistance from the March 19, 2026 edition of the Argus North America Newsletter, I learned that the Cincinnati price for barge loads of urea surged higher due to the current Middle East conflict. On that date, urea averaged $718/ton, compared to week earlier price of $675/ton, and year earlier price of $445/ton. This means that urea at 45% N (900# of N/ton of fertilizer) has a price of 79.7 cents/lb.

Here’s the take-home messages: First, figure out how much fertilizer you can afford. Get that fertilizer ordered. If you haven’t already done so in the last three years, sample soils so that you can accurately apply amendments per recommendation. Use nature’s contribution as part of the cake, not just the frosting. Apply lime by recommendation, accepting that lime price increases have been comparatively negligible. Lastly, increase perennial legumes in the rotation. Typically, their N-fixing bacterial colonies liberate about 10 times as much N as what nature piggybacks on spring snowflakes.

Closing with a quote from Argus: “Urea prices are expected to remain volatile and elevated in the near term as geopolitical risks and natural gas constraints from the U.S.-Iran war tighten global supply. Cargoes presently loading [on the above date] in the Middle East will not arrive in the U.S. until May.”

by Paris Reidhead