I have grown Rubarb a number of times in Brisbane and each year I used have the plants die on me each summer, They just rotted at the stems next to the soil. I then planted them in a Narrow wicking garden with a 25 cm depth to the water reservoir. I did need to fill the reservoir from below to ensure the soil at the surface stayed dry. I have had plants that became too congested and had to be divided, so this system works!!!
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