Creeping wood sorrel numbers decreased linearly and quadratically for those seeded above the rice hull mulch, and decreased linearly for those seeded below. Creeping wood sorrel numbers were greater when seeded below 0.6 cm rice hulls compared to above, while those seeded in 1.3 or 2.5 cm rice hulls were similar with respect to seed placement. Similar to results with flexuous bitter cress at 4 WAP, weed numbers were higher in containers seeded below the rice hulls compared to those seeded above when averaged across rice hull depth . Creeping wood sorrel shoot fresh weights at 4 WAP had a similar response to numbers with respect to rice hull depth and seed placement. Repeated measures analyses showed that rice hull depth and time interacted to affect creeping wood sorrel number seeded above  and below the mulch . Among containers seeded above the mulch, numbers increased from 4 to 16 WAP in non-mulched controls. Among these same treatments, all rice hull depths reduced creeping wood sorrel numbers compared to non-mulched controls, and there were no significant differences between those mulched with 0.6 to 2.5 cm. Among containers in which seed was placed beneath the rice hulls, outdoor cannabis grow creeping wood sorrel responded similar to flexuous bitter cress over time.

At 4 WAP, creeping wood sorrel numbers were higher in containers with 0 or 0.6 cm rice hulls compared to those with 1.3 or 2.6 cm rice hulls. From 8 to 16 WAP, there were no differences in creeping wood sorrel number from seed placed below the mulch layer. Shoot fresh weight had a similar response to rice hull depth and time as weed number. Rice hull depth and seed placement affected percent creeping wood sorrel establishment.Establishment was greater when seed were placed beneath the mulch layer at depths of 0 to 1.3 cm, while establishment was similar above or below 2.5 cm rice hulls. . Flexuous bitter cress germinated in Petri dishes at 1 WAS beneath all shade treatments . Only seeds in complete darkness had lower germination than other treatments. By 3 WAS, percent germination increased quadratically from 0% to 88% shade, then decreased as shade increased from 88% to 100%. Flexuous bitter cress that germinated in 0% to 88% shade appeared to have true leaves of similar greenness and short internodes, with leaves emerging near or directly along the agar surface. At 99% shade, there were no true leaves; only cotyledons were present which were up to 0.5 cm inlength and etiolated. At 100% shade, seedlings were etiolated, had elongated hypocotyls up to 1 cm in length, and yellow cotyledons. At 1 WAS, creeping wood sorrel germination increased linearly from 0% shade up to 99% shade . Germination was lower in 100% shade compared to 99% shade. By 3 WAS, creeping wood sorrel germination was similar across all light treatments and averaged 92%. This is in contrast to work by Holt  who reported decreased germination with decreased irradiance , and no germination in complete darkness.

Creeping wood sorrel were visually larger in 0% to 61% shade treatments, with most seedlings having true leaves. Creeping wood sorrel in 88% to 99% shade had smaller and fewer true leaves, and those present were pale yellow in color. Those in 99% shade lacked true leaves,cannabis grow equipment and had etiolated hypocotyls with green cotyledons. Seedlings in 100% shade were extremely etiolated  with yellow cotyledons. In Expt. 1, a greater percentage of water passed through rice hulls than peat moss at the initiation  of the experiment . By week 2, a greater percentage passed through rice hulls than both pine bark and peat moss. By 4 weeks, there were no differences in the percent of applied irrigation water that passed through the mulches. By this point, the pine bark and peat moss appeared to be visually saturated and unable to hold additional water applied at irrigation, thus a high percent of the applied water passed through these mulch layers later in the experiment. A similar trend occurred in Expt. 2 with respect to percent of water passing through the mulches. Throughout both experiments, rice hulls allowed for 88% to 96% of the applied irrigation to pass through the mulch layer. In both experiments, rice hulls retained less water than pine bark and peat moss at each time point following irrigation in which water content was determined, and at every week data was collected . In both experiments, pine bark retained more water than peat moss at week 0 . This was unexpected considering one of the most important characteristics of peat moss is its capacity to absorb and internally retain large quantities of water.