Sayen Park Botanical Garden — a botanical garden in Mercer County, New Jersey — is a lesser-known subject for landscape photographers. It sits roughly 1.0 km (0.6 mi) NNW of Hamilton Square.
Sayen Park Botanical Garden (30 acres), also known as Sayen House and Gardens, is a municipal park and botanical garden located at 155 Hughes Drive, Hamilton Square, an area within Hamilton Township, New Jersey. The garden is open year-round from dawn to dusk without charge, though park activity is at its peak in the spring. The garden began in 1912 when Frederick Sayen (1885–1981) purchased the site with his wife, Anne Mellon (1886–1977), a daughter of the Mellon family. The Sayens built a "bungalow" home in the Arts and Crafts style, though with Victorian interior design, and surrounded it with plants and flowers acquired during world travels. The principal collections include species from China, Japan, and England.From the Wikipedia article “Sayen Park Botanical Garden”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Sayen Park Botanical Garden 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 73° in summer but only 26° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:03 AM | 90° E | 7:11 PM | 271° W | 50° | 12h 08m |
| June solstice (Jun 21) | 5:30 AM | 58° ENE | 8:32 PM | 302° WNW | 73° | 15h 02m |
| September equinox (Sep 22) | 6:47 AM | 89° E | 6:58 PM | 271° W | 50° | 12h 11m |
| December solstice (Dec 21) | 7:18 AM | 121° ESE | 4:36 PM | 240° WSW | 26° | 9h 18m |
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 | 8:02 AM | 4:16 PM | 4:57 PM | 5:27 PM | 9h 37m |
| February | 6:25 AM | 6:53 AM | 7:31 AM | 4:57 PM | 5:34 PM | 6:02 PM | 10h 41m |
| March | 6:44 AM | 7:11 AM | 7:47 AM | 6:30 PM | 7:06 PM | 7:33 PM | 11h 54m |
| April | 5:53 AM | 6:21 AM | 6:58 AM | 7:01 PM | 7:37 PM | 8:05 PM | 13h 16m |
| May | 5:13 AM | 5:44 AM | 6:23 AM | 7:29 PM | 8:08 PM | 8:39 PM | 14h 24m |
| June | 4:56 AM | 5:29 AM | 6:10 AM | 7:50 PM | 8:31 PM | 9:04 PM | 15h 01m |
| July | 5:10 AM | 5:42 AM | 6:22 AM | 7:48 PM | 8:28 PM | 9:00 PM | 14h 46m |
| August | 5:41 AM | 6:11 AM | 6:48 AM | 7:20 PM | 7:58 PM | 8:27 PM | 13h 47m |
| September | 6:13 AM | 6:40 AM | 7:16 AM | 6:34 PM | 7:09 PM | 7:37 PM | 12h 29m |
| October | 6:42 AM | 7:10 AM | 7:47 AM | 5:43 PM | 6:20 PM | 6:48 PM | 11h 11m |
| November | 6:16 AM | 6:45 AM | 7:25 AM | 4:03 PM | 4:43 PM | 5:12 PM | 9h 58m |
| December | 6:44 AM | 7:15 AM | 7:58 AM | 3:51 PM | 4:34 PM | 5:05 PM | 9h 19m |
Local time (America/New York), 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 Sayen Park Botanical Garden, 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 7 (suburban / urban transition), 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 | — | -2° | — |
| February | 5:16 AM – 5:16 AM | 0.0 | 11° | SE → SE |
| March | 4:27 AM – 5:37 AM | 1.2 | 17° | SE → SSE |
| April | 2:25 AM – 4:35 AM | 2.2 | 20° | SE → S |
| May | 12:20 AM – 3:50 AM | 3.5 | 21° | SE → S |
| June | 10:35 PM – 3:25 AM | 4.8 | 21° | SE → SSW |
| July | 10:27 PM – 1:57 AM | 3.5 | 21° | S → SW |
| August | 9:40 PM – 12:00 AM | 2.3 | 20° | S → SW |
| September | 8:42 PM – 9:52 PM | 1.2 | 17° | SSW → SW |
| October | 7:51 PM – 8:01 PM | 0.2 | 11° | 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: 7 Bortle 7 — Suburban / urban transition. The whole sky has a grey-white glow; the Milky Way is invisible to the eye. Modeled zenith brightness ≈ 18.39 mag/arcsec². Aurora needs roughly Kp 6.5+ 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 51% average cloud cover) and December as the cloudiest (64%). July is the warmest month and January 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 | 67 | 71 | 73 | 91 | 88 | 96 | 102 | 101 | 96 | 92 | 75 | 71 |
| Low °F | -2 | -3 | 0 | 24 | 33 | 44 | 52 | 53 | 43 | 28 | 14 | 6 |
| Precip. (in) | 3.1 | 3.4 | 3.9 | 3.9 | 3.8 | 4.7 | 4.5 | 4.4 | 3.8 | 4.4 | 3.6 | 4.4 |
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
- 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.
- A macro lens or close-up filter opens a world of detail — try a shallow aperture against a soft background.
- Many gardens restrict tripods or charge for photography; check the rules before you go.
- Check road and trail conditions with the managing agency before you go.
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 Sayen Park Botanical Garden, closest first.
Lake
State Park
Botanical Garden
Waterfall
State Park
State Park
State ParkFAQ
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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.