Boettcher Memorial Tropical Conservatory — a botanical garden in Denver County, Colorado — is a lesser-known subject for landscape photographers. It sits roughly 2.2 km (1.4 mi) ESE of Denver.
The Boettcher Memorial Tropical Conservatory, located at Denver Botanic Gardens, is an iconic landmark in Denver, Colorado. The tropical conservatory was designed in 1964 by Denver architects Victor Hornbein and Ed White Jr. and opened in 1966. Its structure consists of high, interlaced concrete arches inset with faceted Plexiglas panels, which suitably honor benefactor Claude Boettcher of the Ideal Cement Company. In 1973, it was awarded Denver Landmark status. The Boettcher Memorial Tropical Conservatory incorporates more than 11,000 sq. ft. of plants from tropical and subtropical regions, as well as a fabricated two-story banyan tree that offers a multi-layered view of the tropical forest.From the Wikipedia article “Boettcher Memorial Tropical Conservatory”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Boettcher Memorial Tropical Conservatory the sunrise point swings a long way through the year: about 58° (ENE) at the June solstice and 121° (ESE) in late December. Sunset moves from 302° (WNW) in June to 240° (WSW) in December, and the midday sun climbs to 74° in summer but only 27° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:04 AM | 90° E | 7:12 PM | 271° W | 50° | 12h 08m |
| June solstice (Jun 21) | 5:33 AM | 58° ENE | 8:32 PM | 302° WNW | 74° | 14h 59m |
| September equinox (Sep 22) | 6:48 AM | 89° E | 6:59 PM | 271° W | 51° | 12h 10m |
| December solstice (Dec 21) | 7:18 AM | 121° ESE | 4:39 PM | 240° WSW | 27° | 9h 21m |
Azimuth is measured clockwise from true north (90° = east, 270° = west). Computed for 2026; values change by less than a degree from year to year.
Golden hour & blue hour by month
Gardens are best on bright overcast days or early mornings when dew is fresh and the wind is calm.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:50 AM | 7:20 AM | 8:01 AM | 4:19 PM | 5:00 PM | 5:30 PM | 9h 40m |
| February | 6:26 AM | 6:53 AM | 7:31 AM | 4:59 PM | 5:36 PM | 6:04 PM | 10h 43m |
| March | 6:45 AM | 7:12 AM | 7:48 AM | 6:31 PM | 7:07 PM | 7:34 PM | 11h 55m |
| April | 5:55 AM | 6:23 AM | 6:59 AM | 7:02 PM | 7:38 PM | 8:06 PM | 13h 15m |
| May | 5:16 AM | 5:46 AM | 6:25 AM | 7:29 PM | 8:08 PM | 8:38 PM | 14h 22m |
| June | 5:00 AM | 5:32 AM | 6:13 AM | 7:50 PM | 8:30 PM | 9:03 PM | 14h 58m |
| July | 5:13 AM | 5:45 AM | 6:25 AM | 7:48 PM | 8:28 PM | 8:59 PM | 14h 43m |
| August | 5:44 AM | 6:13 AM | 6:50 AM | 7:21 PM | 7:58 PM | 8:27 PM | 13h 45m |
| September | 6:15 AM | 6:42 AM | 7:17 AM | 6:35 PM | 7:10 PM | 7:37 PM | 12h 29m |
| October | 6:43 AM | 7:11 AM | 7:47 AM | 5:45 PM | 6:22 PM | 6:49 PM | 11h 11m |
| November | 6:16 AM | 6:45 AM | 7:25 AM | 4:06 PM | 4:45 PM | 5:14 PM | 10h 00m |
| December | 6:44 AM | 7:15 AM | 7:57 AM | 3:54 PM | 4:37 PM | 5:07 PM | 9h 23m |
Local time (America/Denver), including daylight saving time. Golden hour runs from about −4° to +6° solar altitude, so the morning golden hour begins during blue hour, before sunrise.
Milky Way & night sky
From Boettcher Memorial Tropical Conservatory, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 4.8 hours on a moonless night), and the core peaks around 21° above the southern horizon. Our light-pollution model puts the sky at about Bortle 8 (city sky), so expect visible sky glow; drive away from towns for better results.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -3° | — |
| February | 5:07 AM – 5:17 AM | 0.2 | 11° | SE → SE |
| March | 4:17 AM – 5:37 AM | 1.3 | 18° | SE → SSE |
| April | 2:15 AM – 4:45 AM | 2.5 | 21° | SE → S |
| May | 12:18 AM – 3:48 AM | 3.5 | 21° | SE → S |
| June | 10:32 PM – 3:22 AM | 4.8 | 21° | SE → SSW |
| July | 10:24 PM – 2:04 AM | 3.7 | 21° | S → SW |
| August | 9:39 PM – 11:59 PM | 2.3 | 21° | S → SW |
| September | 8:42 PM – 10:02 PM | 1.3 | 18° | SSW → SW |
| October | 7:52 PM – 8:02 PM | 0.2 | 12° | SW → SW |
| November | Below 10° in darkness | — | 0° | — |
| December | Below 10° in darkness | — | -19° | — |
Window when the galactic core is at least 10° high during astronomical darkness on the 15th of each month. Pick nights within a few days of the new moon. Plan exact nights with the Milky Way planner.
Estimated sky darkness: 8 Bortle 8 — City sky. Only bright constellations are visible; the sky glows orange or white. Modeled zenith brightness ≈ 18.37 mag/arcsec². Aurora needs roughly Kp 7.5+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show September as the clearest month (about 38% average cloud cover) and February as the cloudiest (57%). July is the warmest month and December the coldest, which matters for gear, snow access and how long batteries last at night.
Average cloud cover (%)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 70 | 73 | 79 | 87 | 95 | 103 | 103 | 102 | 97 | 86 | 77 | 67 |
| Low °F | -2 | -9 | 0 | 10 | 21 | 35 | 49 | 43 | 28 | 8 | -1 | -6 |
| Precip. (in) | 0.5 | 0.6 | 1.1 | 1.8 | 2.3 | 1.9 | 2.4 | 2.2 | 1.3 | 1.0 | 0.6 | 0.5 |
Monthly climatology for the surrounding 1° grid cell from NASA POWER (MERRA-2). Mountain sites can be colder and cloudier than the cell average.
Photography tips for this botanical garden
- Many gardens restrict tripods or charge for photography; check the rules before you go.
- Backlit petals glow; position yourself so the sun is behind the flower.
- Seasonal exhibits (orchids, tulips, cherry blossoms) draw crowds — arrive at opening.
- Kaleidoscopic and abstract images are great for flower close-ups — try the online kaleidoscope tool.
- Tell someone where you're going in remote areas and carry the ten essentials.
Season: Spring bulbs and blossoms, summer perennials and autumn color; glasshouses offer winter subjects.
Suggested gear: Macro lens, Diffuser, Small reflector. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Boettcher Memorial Tropical Conservatory, closest first.
Botanical Garden
Botanical Garden
Lake
State Park
National Wildlife Refuge
Botanical Garden
National Wildlife Refuge
Mountain Peak
Ghost TownFAQ
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Sources
Location data: Wikidata, Wikipedia. Sun, moon and Milky Way times are computed by LWPhoto Atlas for 2026. Climate: NASA POWER. Sky darkness is a population-based estimate (Walker's law), not a measurement. See data sources & licenses.