From Wheatfield to Pesach Table: Star-K Kosher Certification Takes You Behind the Scenes at Migrash Farm


By Margie Pensak

The hefty $20-$50 price per pound of handmade shemurah matzah may cause you to raise your eyebrows, especially when comparing it to the price of machine-made matzah, but if you only knew what goes into manufacturing the crisp, paper-thin, artisanal specialty item, you would understand why it is so pricey.

To keep up with the increasing demand for handmade shemurah matzah, matzah bakeries around the world start baking as early as October. However, actually, the labor-intensive process of producing Star-K certified shemurah flour began a few months before, in July. That is when Rav Moshe Heinemann visited the 28-acre Migrash Farm, located inside the Chesapeake Watershed, just a stone’s throw from Star-K’s Baltimore headquarters. The farmer, R’ Yosef Hertzmark, who doubles as a Star-K menaker, accompanied Rav Heinemann as he walked the fields to supervise the shemurah wheat harvest, deeming its extra level of scrutiny, “shemurah mishaas ketzirah” (guarded from the time of harvest).

The flour’s supervision began even earlier than July 11. It started when the grain was planted, last fall, to ensure the crop would be yoshon, and then when the plants started to form seed heads, these were monitored for grain fill and sprouting. Once the kernels start to harden, but before they sprout new shoots, the wheat is plucked. Since it will be stored until it is milled months later, it must be guarded and stored in a climate-controlled environment. If it is too dry, it will have poor milling qualities and thus poor baking qualities. If it is too moist, it could become moldy and/or chometz. As its Hebrew name “shemurah” implies, the ingredients that go into this type of matzah are “guarded” against leavening, or becoming chometz, by taking extra precautions.

Wheat Harvesting 101

The shemurah wheat manufacturing process is not simple. An understanding of the general life cycle of the crops and the harvesting process will give you a better understanding of what is involved. The planting takes place in the fall; there is initial growth and then dormancy in the winter; there is heavy growth in early spring; and, finally, the flowering and grain set in early summer. The harvesting process includes: the cutting of the crop in the field; threshing the crop to separate grain from chaff; winnowing to clean separated grains from the stalks and chaff; and drying down grains to 14-16% moisture for storage.

“We keep tabs on the weather because we want to be harvesting the grains at their peak ripeness while the shibolim are at their peak dryness,” explains R’ Yosef. “Too early, and the grains will be under ripe, and without quick drying, these grains are more prone to sprouting or molding, thus making them posul for shemurah. If the grains stand on the stalk too long in the field, they are also more prone to sprouting. If the grains are ripe, but there has just been a rain, the wet grains will be hard to harvest and again will be more prone to sprouting and/or molding in storage. We are looking for the perfect intersection of ripeness and dryness.”
To properly understand the cereals in the context of shemurah matzah (and yoshon), the two main areas of understanding and experience are: 1) grass anatomy and morphology, i.e., the different parts/structures of the plant and how they vary between varieties and species; and 2) crop phenology, i.e., how the crop develops and grows through its lifecycle.

“Regarding structures, we are primarily looking at the grain heads (shiboles in Hebrew) and then specifically at the grains themselves,” notes R’ Yosef. “Are the kernels cured or are they starting to grow? We check this both in the field before harvest and in storage. For the life cycle, we are interested in when the kernel starts to root in the ground after seeding the field, as this determines that crop’s status relative to yoshon.”

Keeping Crops Separate

Because we require an unadulterated grain crop for shemurah matzoh, we concern ourselves with other seeds that might mix in with the crops. There are many field crops and weeds that share a similar seasonal timeframe with the grain crops, and if mixed in to the grain crop during harvest and/or storage, and ultimately milling, these seeds would pasul the shemurah crop because many of them are kitniyos.

“In general, these field crops grow in solid stands, and anywhere where they might border each other, there might be a little overlap and mixing,” clarifies R’ Yosef. “We try to avoid these edge areas because of this, and similarly we are vigilant as we are harvesting, looking for any weeds or field crops that might adulterate the crop. These weeds and non-target crops are generally hand-pulled or avoided by the combine altogether. Because it is impossible to avoid all non-target individuals and we expect some small amount of weed seed, we will be cleaning and sorting the grain by size, shape and density as many times as we need to in order to ensure that no other seeds are mixed into the final millable product.”

Clean Machines

To ensure that the harvesting, cleaning and storage equipment is free of non-shemurah grain or potential adulterants, all the equipment must be thoroughly cleaned.

“We first take apart and open all machinery as best as possible, and while running, we alternately blast it with compressed air and industrial vacuuming,” describes R’ Yosef. “We then do it all over again while the unit is put back together and running. We repeat these steps until the machinery runs clean and no more material is being blasted around or vacuumed up. This same process is done for the harvesting, cleaning and storage equipment. We do not have to kasher the equipment, as there is no bishul happening anywhere in the process.”

Star-K Kashrus Administrator Rabbi Zvi Goldberg accompanied Rav Heinemann to Migrash Farm and concludes, “I’ve had the zechus to see Rav Heinemann in many areas of halacha – selling a Jewish-owned animal to avoid the concerns of a bechor, selling chometz, checking esrogim, and so on, but I’ve never seen the checking of a shemurah field. When I heard that the rov was checking one nearby, I jumped at the opportunity to observe this. The rov checked three areas to be machzik that the kernels had not become chometz. When he made a bracha (ha’adama) and ate some, at first I didn’t realize that it was part of the process to ensure that they are hard and not soft. The rov joked that you can tell it is ready if it breaks your teeth!”



  1. i went down this year to delaware to cut wheat for a matzah bakery. the weather was 110 degrees and you have to go into the dumpsters to clean them but cant touch them cuz its 150 degrees. but it was well worth it to know that yiddin are getting good kosher matzas.


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