Cleistocactus strausii
The cactus prefers free draining soils, strong sunlight, but not high temperatures — in fact it can withstand hard frosts down to -10 °C. In its natural habitat it receives plenty of water during the summer, but almost none over the winter. In cultivation, watering too much in winter often leads to root rot.
Aralia cordata
After seedlings are planted, the soil around the roots should be watered. The surroundings should be concealed with one to three inches of leaf or bark mulch, no higher than the base of the stem. It is useful to water in the morning rather than at night to prevent diseases. To prevent wilting, plants should be watered slowly and enough to achieve deep moisture, achieved by watering, waiting three minutes and watering again. To achieve water-conservation, soaker hoses, drip irrigation, distribution of mulch to prevent water evaporation, and a soil ring around the plant to retain water may be effective. It should be noted that overwatering may cause root issues. Soil drenching is effective in increasing the size of the shoots.