Planting tulip bulbs in trays has recently become a fashionable trend, provided we do not have voles in our garden. The cardboard extrudate will decompose, and we are eco because we do not introduce plastic into the environment. Tulips will grow at the distances we plan ourselves. In each of these extrudates, you can choose the appropriate spacing by placing the bulbs densely next to each other or using only every second or third hole. See how effective spring looks like. I planted tulip bulbs last autumn. After planting, the bulbs will first produce roots and accumulate water to survive the cold season that initiates flowering. The bulbs prepared in this way waited until spring to give flowers, when the soil thawed due to warm sunlight. Since I planted the botanical tulips, they already bloomed in April. In a year they will look even more beautiful because they bloom less in the first year after planting