Crops that are grown on large scales and bloom en masse create large pulses of resources that have substantial impacts on communities of ecosystem service providers. These dynamics are particularly relevant for pollinator dependent crops given the dramatic increase in the area planted to these crops9 and their importance for human nutrition1011. Pulses in floral resources associated with mass blooming of crops are known to alter pollinator abundances and visitation rates in nearby crops and natural habitats12131415, which are likely to have direct impacts on crop yields16. Mass flowering crops can increase pollinator offspring production17 and pollinator densities following mass bloom1819, particularly for solitary, univoltine bees20 for which the bloom of a single crop may represent nearly the entire span of their adult foraging activity. Therefore, mass flowering crops may facilitate pollination of co-blooming crops when pollinators attracted and supported by the mass blooming crop spill over into the co-blooming crop, augmenting floral visitation and crop pollination21 (Fig. 1). Alternatively, when pollinators are limited, as is common in simplified agricultural systems22, plants with high overlap in their pollinator community may compete for visits from shared pollinators23 (Fig. 1).