I have had some hit and misses, pursavere and try different times of the year. Once established Rhubarb is the gift that keeps on giving in my opinion. A lot of sites say full sunlight but my most successful Rhubard is by a wall that gets sunlight most of the day but not all of the day. I found early spring good so it is well enough established for winter and I have covered my younger plants with pots over the coldest months