1. Baumgartner S., Thurneysen A., Heusser P.Growth stimulation of dwarf peas (Pisum sativum L.) through homeopathic potencies of plant growth substances.Forsch Komplementarmed Klass Naturheilkd. 2004, Oct,11, 5:281-92. In an effort to determine the effects of homeopathically potentised plant growth substances on the shoot growth characteristics of dwarf peas, plant cultures were immersed for 24 hours in solutions containing 4 different plant growth substances in 12X to 30X potencies. These were compared to cultures grown in a control substance. At shoot length measurement after a 14 day growth period, the cultures grown in the potentised growth substances showed a measurable effect on the seed growth characteristics when compared to the control substance, the most notable of these, gibberellin 17X, producing the largest growth stimulation.

2.Baumgartner S,Shah D,Schaller J,Kämpfer U,Thurneysen A,Heusser P.Reproducibility of dwarf pea shoot growth stimulation by homeopathic potencies of gibberellic acid.Complement Ther Med.2008 Aug;16(4):183-91. In this Swiss study, which was slight variation of previous work done in this area by Hamman and others, dwarf pea seedlings in 4 batches containing seeds taken from adult plants in 1997, 1998, 1999 and 2000, were exposed to 17X and 18X potencies of Gibberellic acid (GA) and cultivated under controlled conditions, alongside dwarf pea seedlings that had received the same level of exposure to 2 negative control substances. GA in material doses is often used commercially to break periods of dormancy in seeds and has the capacity to stimulate the growth of seedlings and it’s an endogenous component of some seeds and is involved in the growth of seeds and alpha amylase activity within the plant. After 14 days all of these seedlings had their lengths measured and at this point it was found that the controls had performed as predicted, the 1997 seedling batch previously exposed to GA 17X and GA 18X had exceeded the growth rate of the controls by an average of 11.2% and the 1998 batch responded with a mixture of either stimulation or suppression of growth. Batches from 1999 and 2000 failed to respond to either potency of GA.

3.Binder M,Baumgartner S,Thurneysen A.The effects of a 45x potency of arsenicum album on wheat seedling growth — a reproduction trial.Forsch Komplementarmed Klass Naturheilkd.2005 Oct, 12, 5, 284-91. In a repeat performance of the previous trial, wheat seedlings previously exposed to sub-lethal doses arsenic were cultivated in either Arsenicum album 45X, water 45X or un-potentised water, and the seedling height measured at 7 days. The experiment was independently reproduced 8 times and after the results were collated the wheat seedlings cultivated in Arsenicum 45X showed a significant reduction in height when compared to the 2 controls.

4. Bornoroni C.Synergism of Action between Indolacetic Acid and Highly Diluted Solutions of Calc carb on the Growth of Oat Celeoptiles.Berlin J on Res in Hom, 1, 4/5, December 1991, 275-278. This study demonstrated that Calc carb 5X significantly increased the growth stimulating effects of the plant growth stimulant, indole acetic acid.

5.Brizzi M,Lazzarato L,Nani D,Borghini F,Peruzzi M,Betti L.A biostatistical insight into the As(2)O(3) high dilution effects on the rate and variability of wheat seedling growth.Forsch Komplementarmed Klass Naturheilkd.2005 Oct, 12, 5, 277-83. Wheat seedlings previously stressed with sub-lethal doses of arsenic, a substance known to be lethal to this plant, were treated with various potencies of Arsenicum album (5X, 15X, 25X, 35X and 45X), equivalent potencies of water and equivalent un-succussed dilutions of arsenic trioxide. The stem lengths of the seedlings was assessed at day 7 and it was found that the 45X potencies ofArsenicumand the water but not the diluted arsenic trioxide induced an increase in seedling height.

6. Endler PC, Pongratz W.Homoeopathic Effect of a Plant Hormone?Berlin J on Res in Hom, 1, 3, June, 1991, 148-150. This study showed that Indole Butyric Acid, known at material levels to enhance the growth of new roots and leaves from plant slips, at a 33X potency, continued to provide an enhancement of growth

7. Jones RL, Jenkins MD.Plant Responses to Homoeopathic Medicines.British Homeopathic Journal,70, 3, July 1981, 120-146. The authors of this work set out to study the effects of various homeopathic potencies of Silver nitrate on the growth characteristics of the leaf sheaths of wheat. On analysis of the results they found that potencies of silver nitrate were in fact able to either inhibit or stimulate growth, depending upon the potency applied.

8.Scherr C,Simon M,Spranger J,Baumgartner S.Effects of Potentised Substances on Growth Rate of the water plant Lemna gibba.Complementary Therapies in Medicine.2009 Apr;17(2):63-70. Claudia Scherr and colleagues at the Research Institute of Organic Agriculture in Frick, Switzerland, conducted this randomised, controlled and blinded study to determine the extent to which various homeopathically potentised substances could influence the growth of Duckweed (Lemna gibba) when compared to controls. To do this, Duckweed was grown in 14X to 30X homeopathic potencies of Argentum nitricum, Lemna minor and Gibberelic acid (a known plant growth regulator), over a period of 7 days.  Measurements were taken over 0-3 days, 3-7 days and 0-7 days. Succussed and un-succussed water controls were used. Neither controls produced any statistically significant effect and the potencies that caused the most pronounced reduction in growth when compared to controls were those of Gibberelic acid, particularly the 15X, 17X, 23X and 24X potencies.

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