Brahmanda Guruji Shri Narendra Babu Sharmaji gave us the information on Nine Planets (Nava Graha) and plant / tree related to it. Guruji recited this Nava Graha Mantra before starting this topic
Om Namah Sooryaaya Chandraaya Mangalaya Budhayaashch
Guru Shukra Shanibhyashch Raahuve ketuve Namah
These plants are planted outside the temple garden, the plant for Sun (Ark Plant) will be in the middle and the other plants planted on the four sides of that plant.

Ark Plant / Milkweed Plant (Sun)
--"Ark Bhasm" is used in the Talisman that is made for maintaining the effects of the placement of Sun in the horoscope. If Ark Bhasm is used when the Sun is placed well in the horoscope, it leads to dignity, leadership, confidence, power and nobility. The individual becomes strong, compassionate, pious, well read and leads a happy life. When the Sun is ill placed in the horoscope, it leads to low self esteem and energy, lack of confidence and negative results in life. Ark Bhasm nullifies the malefic effects of the ill placement of Sun.

Palaash Plant / Flame-of-the-forest Tree (Moon)
"Palaash Bhasm" is used for maintaining the effects of Moon on the horoscope. If the Moon is well placed in the horoscope, the use of "Palaash Bhasm" leads to good habits, stable life and health and the individual is hard working, wealthy and well respected. If the Moon is ill placed in the horoscope, it leads to depression, hypersensitivity and stress which are removed by the use of "Palaash Bhasm".

Khadira / Couch Plant (Mars)
"Khadira Bhasm" is used for controlling the effects of the planet Mars. If Mars is well placed in the horoscope, it leads towards positive energy, strength, courage, passion, and aggression. The use of "Khadira Bhasm" makes the individual energetic, learned, well known and noble. When Mars is ill-placed in the horoscope, it leads to anger, irritability, instability, aggression and the individual is prone to high blood pressure, anemia, and impurities in the blood. The "Khadira Bhasm" is used to counteract these bad effects of Mars.

Apaamaarg Plant / Prickly Chaff Plant (Mercury)
"Apaamaarg Bhasm" is ideal for controlling the effects of planet Mercury. If Mercury is well placed in the horoscope of an individual, it leads to rationality, wit and dexterity. The use of "Apaamaarg Bhasm" makes an individual happy, educated, fortunate and highly respected. If the Mercury is ill-placed in the horoscope, it leads to lack of concentration, speech and hearing impediments, lack of vitality and lack of communication. The "Apaamaarg Bhasm" leads to a removal of these malefic effects of Mercury.

Peepal Tree / Pippal Tree (Jupiter)
"Pippal Bhasm" is used for controlling the effects of Jupiter. When the Jupiter is well placed in the horoscope, the use of "Pippal Bhasm" leads towards spiritualism, caring, optimism, faith, good judgment and the individual is blessed with power and respect. If the Jupiter is ill-placed in the horoscope, it leads to unhappiness, selfishness, egotism, sloth and greed and all these bad effects are removed by the use of "Pippal Bhasm".

Audumbara / Doomar (Venus)
"Audumbara Bhasm" is used for maintaining the good effects of planet Venus. If the placement of Venus is good in the horoscope, it leads to attractiveness, grace, elegance and long life. The use of the "Audumbara Bhasm" makes an individual refined with humanitarian qualities. When Venus is ill-placed in the horoscope, it leads to vanity, corruption, lack of taste and refinement and ageing and the "Audumbara Bhasm" is used to remove these effects of Venus.

Shamee Tree / Prosopis (Saturn)
"Shamee Bhasm" is used to control the effects of Saturn (Shani). If Saturn is well placed in the horoscope, it leads to discipline in life, responsibility, humbleness and if "Shamee Bhasm" is used by the individual, he has a long life, is charitable and proficient in every work. If Saturn is ill placed in the horoscope, the individual suffers from depression, anxiety, fear, loneliness and disorders of the nervous system. "Shamee Bhasma" is used for removing these bad effects of Saturn.

Doorvaa Grass / Bermuda Grass (Raahu)
"Doorvaa Bhasm" is essential for controlling the effects of Raahu. If the Raahu is well placed in an individual's horoscope, it leads to inspiration, originality, insight and uniqueness. The use of " Doorvaa Bhasm" makes the individual wealthy and fortunate. If the planet Raahu is ill placed in the horoscope it leads to paranoia, addictions, mental ailments, stress and troubles. The use of "Doorvaa Bhasm" removes such bad effects of Raahu.

Kush Grass / Sacrificial Grass (Ketu)
"Kush or Kushaa Bhasm" is used for controlling the effects of planet Ketu. If Ketu is well placed in the horoscope of an individual, it leads to spiritualism, sensitivity and high intuitive powers. The use of "Kushaa Bhasm" makes the individual wealthy and protected against evil. If the Ketu is ill-placed in the horoscope, it will lead towards eccentricity, irrational behavior, fanaticism and addictions like gambling and fatal diseases such as cancer. To remove these effects of Ketu, "Kushaa Bhasm" is used.

Here is the table on it:

Botanical Names
http://www.youtube.com/watch?v=77fBGA8j6IE&feature=player_embedded

Aditya ch Somaaya Mangalaaya Budhaayashch l
Guru Shukra Shanibhyashch Raahuve Ketuve namah: ll

Japaakusum samkaashyam, Kaashyapeyam Mahadityam l
Tamorim Sarva papagnam, Prantosmi Diwakaram ll  Soorya ||

Dadhishankh Tushaarabham, Ksheero darnav samudbhavam l
Namaami Shashinaam Somam, Shambhormukut Bhooshanam ll Chandra ||

Dharanee garbh Sambhootam, Vidyut kaanti Samaaprabham l
Kumaaram Shakti hastam, tam Mangalam Pranamaamyaham ll Mangal ||

Priyangu Kalikashyamam, Roopenaa pratimaam Budham l
Saumyam Saumya gunopetam, Tam Budham Pranamaamyaham ll Budh ||

Devanancha Rishinancha Gurum kaanchanam Sannibham l
Buddhimantam Trilokesham, Tam namaami Brihasptimam ll Guru ||

Him Kund Mrinaalaabham Daityaanaam Paramam Gurum |
Sarv Shaastra Pravaktaaram Bhaargavam Pranamaamyaham || Shukra ||

Neelaanjan samaabhaasam, Raviputram Yamaagrajam l
Chhaayaa maartand Sambhootam, Tam namaami Shanishcharam ll Shani ||

Ardha kaayam Mahaaveeram, Chandraaditya Vimardanam l
Sinhikaa garbha Sambhootam, Tam Raahum Pranamamyaham ll Raahu ||

Palash Pushp sankaasham, Taarakaa Graha mastakam l
Raudram Raudraatmakam Ghoram, Tam Ketum Pranamaamyaham ll Ketu ||

Iti Vyasa Mukhodgeetam Ya Pathet Susamaahit:
Divaa Vaa, Yadhi Vaa Raatrau Vighn Shaantir Bhavishyati
Nar Naaree Nripaanaam cha Bhaved, Duh-swapn naashanam,
Aishwaryam Tulam Teshaamaarogyam Pushti Vardhanam.
Graha Nakshatraja: Peedaa, taskaraagni Samudbhavaa:
Taa: Sarvaa: prashamam Yaanti Vyaaso Broote Na Sanshayaa:

ll Iti shri vyaas virachit navagraha stotram sampoornam ll

All the nine Graha (planets) viz Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn, Raahu (Snake's head) and Ketu (Snake's tail) give us pleasure and serenity and remove obstacles from our way. The names of the seven bodies (Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn) are still connected, in some languages, with the seven days of the week. In astrology, great importance is placed on the positions of the various planets in the twelve constellations of the zodiac, the belt around the sky in which the movements of the Sun, Moon and planets are confined. All astrology is totally based on the planetary movements and its effect on human beings. Nava Graha along with their consorts are found very rarely even in India. It is one of a kind in Singapore. Nava Graha with their consorts are called "Shakti Samet Nava Graha". Praying to the Graha when they are with their consorts is considered to bring immediate positive influence as the Graha are in a cheerful mood. Each Graha Devtaa are having set plants and the Bhasm prepared with them are used as to reduce the ill effect created by them.