Sentence:  We presume it to be a plant requiring to be grown in peat earth, and :to have the pots in which it is, grown well and carefully drained of superfluous water; and we should further suppose it undesirable to <WSD>overshift</WSD> it, especially while young, and in an unestablished condition. 
Meaning of the word marked with <WSD> tags:  (horticulture) To replant or repot too soon or too often.