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Table 1 Agro-ecological zones for the four sub-Counties in Kenya showing the environmental conditions during the dry and wet seasons, and sampling sites for Rosmarinus officinalis leaves

From: Evaluation of seasonal variation, effect of extraction solvent on phytochemicals and antioxidant activity on Rosmarinus officinalis grown in different agro-ecological zones of Kiambu County, Kenya

Zone description altitude in m (above sea level)

Zone

Sampling sites

Coordinates

Parameter

Wet season

Mid-March–June

Dry season

July–September

Lowest

Highest

Lowest

Highest

Upper Highland

1800–2550

Lari

1. Kirenga

2. Gitithia

3. Gituamba

4. Nyambari

5. Githirioni

6. Rukuma

1°01′00.0"S 36°38′00.0"E

Temperature (°C)

23

28

23

25

Humidity (%)

65

83

66

72

Rainfall (mm)

119

269

66.5

74.5

UV Index

5

5

4

5

Rainfall days

3

11

3

4

Sun hours

325.9

355.1

349.2

357

Lower Highland

1500–1800

Kiambaa

1. Ruaka

2. Ndenderu

3. Kihara

4. Muchatha

5. Gathiga

6. Karura

1°11′00.0"S 36°45′00.0"E

Temperature (C)

23

28

23

25

Humidity (%)

65

83

66

72

Rainfall (mm)

111.9

260

66.54

74.5

UV Index

5

5

4

5

Rainfall days

3

11

3

4

Sun hours

325.9

355.8

349.2

357

Upper Midland

1300–1500

Juja

1. Murera

2. Mugutha

3. Gitothua

4. Kihunguro

5. Kalimoni

6. Juja Farm

1°11′00.0"S 37°07′00.0"E

Temperature(°C)

24

28

23

26

Humidity (%)

66

83

66

73

Rainfall (mm)

90.3

240

70.34

77

UV Index

5

5

4

5

Rainfall days

4

10

4

5

Sun hours

332.1

354.2

351.4

358.4

Lower Midland

1200–1300

Thika

1. ThikaTown

2. Gatuanyaga

3. Makongeni

4. Munyu,

5. Ngoliba 1

6. Ngoliba 2

1.0490° S, 37.2651° E

Temperature (°C)

24

28

23

26

Humidity (%)

66

83

66

73

Rainfall (mm)

90.3

240

70.3

77

UV Index

5

5

5

5

Rainfall days

4

10

3

4

Sun hours

325.5

354.2

349.5

358.4

  1. Source: World weather online (2021) and Kenya Meteorological Department (2019)