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1927 Map of the Arboretum

Weld Hill Growth Facilities

The Weld Hill Growth Facilities consist of 12 individually controlled greenhouses, 18 growth chambers for precise control of growing conditions, and an outdoor common garden and raised beds. The Weld Hill Growth Facilities (research greenhouses, growth chambers, and common gardens) is available for use by Harvard University Arnold Arboretum and Faculty of Arts and Sciences (FAS) research programs. Use requires an approved space request and is governed by the Weld Hill Plant Growth Facility Policies. No plants should be brought into the growth facilities without approval of the plant growth facilities manager.


Teaching Collection

Teaching Collection

The teaching collection is maintained as an educational resource to support Harvard courses and laboratories related to plant biology.

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Individually controlled greenhouses (x12)

Individually controlled greenhouses (x12)

  • 384 sq ft each
  • 2 fixed benches, 3 rolling benches
  • ARGUS controls: remote monitoring and data logging

Conviron PGR-15 Reach-In Chamber (x4)

Conviron PGR-15 Reach-In Chamber (x4)

  • Growth area: 16.1 sq ft
  • Growth height: 69″ extended height
  • High Light Intensity: 1150 micromoles/m2/s
  • Temperature Range: +10ºC to +45ºC lights ON; +4ºC to +45ºC lights OFF
  • Humidity: Additive humidification and bypass dehumidification with up to 90% RH lights OFF and 85% RH lights ON, limited by a +25*C maximum dewpoint
  • CMP6050 Controls: remote monitoring and data logging

Conviron MPTC-144 Plant Production Chambers (x2)

Conviron MPTC-144 Plant Production Chambers (x2)

  • Growth area: up to 144 sq ft with 4 plant growth modules and 3-tier mobile shelving
  • Growth height: 17″
  • Temperature Range: +15ºC to +35ºC lights ON; +10ºC to +35ºC lights OFF
  • Humidity: Additive humidification with up to 90% RH lights OFF and 85% RH lights ON, limited by a +25*C maximum dewpoint
  • High Light Intensity: 275 micromoles/m2/s
  • CMP6050 Controls: remote monitoring and data logging

Conviron E7/2 Reach-In Chamber (x2)

Conviron E7/2 Reach-In Chamber (x2)

  • Growth area: 8.2 sq ft
  • Growth height: 23.5″
  • High Light Intensity: 550 micromoles/m2/s
  • Temperature Range: +10ºC to +45ºC lights ON; +4ºC to +45ºC lights OFF
  • Humidity: Additive humidification with up to 90% RH lights OFF and 85% RH lights ON, limited by a +25*C maximum dewpoint
  • CMP6050 Controls: remote monitoring and data logging

Conviron G30 Germination Chamber (x1)

Conviron G30 Germination Chamber (x1)

  • Growth area: 16.1 sq ft
  • Temperature Range: +4ºC to +40ºC lights ON or OFF
  • High Light Intensity: 8 lamps per side
  • CMP6010 Controls

Conviron E8 Reach-In Chamber (x2)

Conviron E8 Reach-In Chamber (x2)

  • Growth area: 8 sq ft
  • Growth height: 69″ extended
  • Light Intensity: 1000 micromoles/m2/s
  • Temperature Range: +10ºC to +45ºC lights ON; +4ºC to +45ºC lights OFF
  • Humidity: Additive humidification with up to 90% RH lights OFF and 75% RH lights ON, limited by a +25*C maximum dewpoint
  • CMP6050 Controls: remote monitoring and data logging

Biochambers TPC-19 Reach-In Chamber (x3)

Biochambers TPC-19 Reach-In Chamber (x3)

  • Growth area: 20.4 sq ft
  • Growth Height: 56″
  • Additive CO2 and CO2 scrubber
  • CO2 sensor: Li-Cor Li-820
  • Temperature Range: +4ºC to +40ºC lights ON or OFF
  • Humidity: Additive humidification with up to 90% RH lights OFF and 75% RH lights ON, limited by a +25*C maximum dewpoint
  • Light Intensity: 1500 micromoles/m2/s
  • Light Sensor: Apogee QSO-A5E quantum PAR light sensor (400-700nm spectrum region)
  • Light Source: Halogen incandescent bulbs and T5HO fluorescent lamps
  • VNet Touch Controls: remote monitoring and data logging

Biochambers LTCB-19 Reach-In Chamber (x1)

Biochambers LTCB-19 Reach-In Chamber (x1)

  • Growth area: 19.8 sq ft
  • Growth height: 51″
  • Additive CO2 and CO2 scrubber
  • CO2 sensor: Li-Cor Li-820
  • Temperature Range: -10ºC to +40ºC lights ON or OFF
  • Humidity: Additive humidification with up to 90% RH lights OFF and 75% RH lights ON, limited by a +25*C maximum dewpoint
  • Light Intensity: 1000 micromoles/m2/s
  • Light Sensor: Apogee QSO-A5E quantum PAR light sensor (400-700nm spectrum region)
  • Light Source: Halogen incandescent bulbs and T5HO fluorescent lamps
  • VNet Touch Controls, remote monitoring and data logging

Biochambers LTRB-37 Walk-In Growth Room (x1)

Biochambers LTRB-37 Walk-In Growth Room (x1)

  • Growth area: 38 sq ft
  • Growth height: 82″
  • Additive CO2
  • CO2 sensor: Li-Cor Li-820
  • Temperature Range: -5ºC to +40ºC lights ON; -10ºC to +40ºC lights OFF
  • Humidity: Additive humidification with up to 90% RH lights OFF and 75% RH lights ON, limited by a +25*C maximum dewpoint
  • Light Intensity: 1100 micromoles/m2/s
  • Light Sensor: Apogee QSO-A5E quantum PAR light sensor (400-700nm spectrum region)
  • Light Source: 400W metal halide and 400W High Pressure Sodium lamps
  • VNet Touch Controls: remote monitoring and data logging

Conviron A1000 Tissue Culture Chamber (x2)

Conviron A1000 Tissue Culture Chamber (x2)

  • Growth area: 26 sq ft
  • Growth height: 8″
  • Humidity: Additive humidification with up to 90% RH lights OFF and 60% RH lights ON, limited by a +24*C maximum dewpoint
  • Temperature Range: +10ºC to +45ºC lights ON; +4ºC to +40ºC lights OFF
  • Light Intensity: 200 micromoles/m2/s
  • CMP6010 Controls