once six leaves have formed on the stem, pinch off the tip of the stem to encourage plant growth; this can boost the plant's flower production by up to 50 percent. our piano, organ and sound system will still be available for their use. your reply to her was excellent. give our clinic a ring at (03) 9725 0525 and our friendly staff will be able to answer any other questions you may have. or have i got to look at another path to get a result? non-aggressive - harmless to plants, shrubs and surface being cleaned. so for the machine quality, it's very competitive. 