Author Topic: Annona(ceae) productivity relative to sun (Read 3415 times)

KarenRei · « **on:** March 06, 2018, 06:38:14 PM »

For most of the species I'm working on I have to do a lot of digging, but when it comes to annonas (and their relatives with traditionally annona-like growth habits, such as biriba), I imagine I can get a lot of great responses here: In your experience, what's their relationship between sun and productivity? My general sense - which could be totally off here - is that maximum yield is in full sun; "light shade" (say, a couple/few hours per day) may results in a (halved?) yield, and "partial shade"/"half shade" is little to no yield, with full shade being a dead plant.

Is this generally correct? Are there any species exceptions to this? Some that yield as much or better in light shade, or can even fruit decently in half/partial shade? Some that absolutely demand full sun, with a couple/few hours of shade being prohibitive to fruiting?

KarenRei · « **Reply #1 on:** March 08, 2018, 01:53:53 PM »

No thoughts?

shot · « **Reply #2 on:** March 08, 2018, 01:57:26 PM »

Your right on track with your thoughts not much to add.

Triloba Tracker · « **Reply #3 on:** March 08, 2018, 02:36:24 PM »

I know that Asimina triloba productivity is definitely increased with sun exposure.

behlgarden · « **Reply #4 on:** March 08, 2018, 04:29:52 PM »

I have some cherimoya trees in full sun and then some that get sun until 1 PM only. I actually found ones in partial sun produce much heavier than full sun. Again, sun/summer in So California is very harsh in summer that burns fruits exposed directly to sun. On taste, the ones in shade are more sweeter as well.

4 trees in full sun, 4 in shade, so my sampling is pretty accurate for my area.

KarenRei · « **Reply #5 on:** March 08, 2018, 04:43:24 PM »

From some species descriptions, here's some that (depending on how much you can trust the wording of species descriptions and/or read too much into them!) might fruit as well in *light* shade:

A. cornifolia
A. neosericea
A. senegalensis - said to actually prefer light shade to full sun
A. stenophylla

Some that might be even less shade tolerant than usual (savannah plants or similar)

A. crassiflora
A. leptopetala
A. dioica
A. paludosa
A. spraguei

Does that look right?

KarenRei · « **Reply #6 on:** March 08, 2018, 04:44:39 PM »

Quote from: behlgarden on March 08, 2018, 04:29:52 PM

I have some cherimoya trees in full sun and then some that get sun until 1 PM only. I actually found one in partial sun produce much heavier than full sun. Again, sun/summer in So California is very harsh in summer that burns fruits exposed directly to sun. On taste, the ones in shade are more sweeter as well.

4 trees in full sun, 4 in shade, so my sampling is pretty accurate for my area.

Very interesting, Behlgarden. Makes me wonder about atemoya then. I'm baselining "full sun" on the level of insolation at Manaus, Brazil. Hmm, let me see... are you inland or coastal? Manaus ranges from 4,2 kWh/d/m² in January to 5,62 kWh/d/m² in September.

behlgarden · « **Reply #7 on:** March 08, 2018, 04:50:46 PM »

I am inland at 1300 feet elevation. we get coastal influence fog and winds in summer time. air distance we are about 30 miles away from coast.

KarenRei · « **Reply #8 on:** March 08, 2018, 05:06:07 PM »

Quote from: behlgarden on March 08, 2018, 04:50:46 PM

I am inland at 1300 feet elevation. we get coastal influence fog and winds in summer time. air distance we are about 30 miles away from coast.

Let's see, trying to find a PVWatts weather station similar to your description... I think the best I see is Riverside. About as far from the coast as you describe (but not as high altitude). Summer sun is about 7 kWh/m²/d, so a bit brighter than Manaus on average. But if you get more fog than Riverside then that might reduce it. Let's try a few other stations... yeah, everything even as far as Palm Springs appears to be about 7 kWh/m²/d, so somewhat brighter than Manaus. But there's no high altitude stations, and I don't know what gets fog.

I guess it's probably best then to mark cherimoya as "similar" in light shade and full sun for Manaus-level lighting, with a note that excessive sun might reduce sweetness.

NewGen · « **Reply #9 on:** March 08, 2018, 06:29:50 PM »

Quote from: behlgarden on March 08, 2018, 04:29:52 PM

I have some cherimoya trees in full sun and then some that get sun until 1 PM only. I actually found one in partial sun produce much heavier than full sun. Again, sun/summer in So California is very harsh in summer that burns fruits exposed directly to sun. On taste, the ones in shade are more sweeter as well.

4 trees in full sun, 4 in shade, so my sampling is pretty accurate for my area.

I've noticed this as well. Full sun in my area, hot summer above 100, burn the leaves and reduce yield. This year, I'm gonna put some light shade cloth over them.

KarenRei · « **Reply #10 on:** March 09, 2018, 02:22:33 AM »

Given the results with cherimoya, I wonder if atemoya is the same - any atemoya growers here? Of course, I imagine most will be in Florida, which is a bit dimmer in the summer (more comparable to Manaus).

(Hmm, curious... the most sun-rich month in Miami is April! I guess the summer storms haven't moved in yet then)

ftmyersfruit · « **Reply #11 on:** March 09, 2018, 02:21:55 PM »

My atemoya and sugar apples fruit fine in full sun in swfl. I think you can get away with them under a larger tree as well if you get a half day of sun.

9B in Brazil · « **Reply #12 on:** March 09, 2018, 03:00:00 PM »

In Southern Brazil, I have many annonas in partial shade that do quite well. Due to wind damage, we find that the protection of other trees are helpful. We have high yields and sweet fruit. Our climate is very different than in Manaus, which is very hot and humid year round. Here we have cooler winters approaching freezing, and the trees do fine.

Good luck on your project.

KarenRei · « **Reply #13 on:** March 09, 2018, 03:09:02 PM »

Hmm, sounds like the baseline for annonas, rather than "full production in full sun, half production in light shade, little to none in half shade" should be more like "(roughly) full production in either full sun or light shade, minor production in half shade" - and then adjusting from there based on e.g. savannah vs. rainforest species and other available information.

sahai1 · « **Reply #14 on:** March 10, 2018, 01:11:41 AM »

soursop is flowering for the second time this year, earlier 40 or so flowers, but only one set at the end of the rainy season. Now after 1 month of no rain it is also flowering again. Full 10 hour sun on this one, hopefully more fruit will set in the dry season.

Mark in Texas · « **Reply #15 on:** March 10, 2018, 09:29:37 AM »

Quote from: NewGen on March 08, 2018, 06:29:50 PM

I've noticed this as well. Full sun in my area, hot summer above 100, burn the leaves and reduce yield. This year, I'm gonna put some light shade cloth over them.

PITA, just give them a spray of Surround WP, a sprayable kaolin clay dust. It not only is a great sunscreen but pesticide too.

Mark in Texas · « **Reply #16 on:** March 10, 2018, 09:35:32 AM »

Quote from: 9B in Brazil on March 09, 2018, 03:00:00 PM

Here we have cooler winters approaching freezing, and the trees do fine.

This is what I was wondering and exactly what I want to hear. Am on my way to creating a cocktail cherimoya tree of 2 varieties beginning with recent grafts of Campas. To limit propane costs my greenhouse controller's heat setpoint is set at 35F or 1.7C which is really good for my Moro blood orange too.

Guanabanus · « **Reply #17 on:** March 10, 2018, 03:34:23 PM »

Near Manaus, where I grew up, I have seen many Biriba' (Rollinia deliciosa / Annona mucosa) growing in in full sun, fruiting well. Many others were in a lot of shade on all their sides, from being planted too close to other trees; these mostly fruited very high up.

KarenRei · « **Reply #18 on:** March 10, 2018, 03:48:24 PM »

Quote from: Guanabanus on March 10, 2018, 03:34:23 PM

Near Manaus, where I grew up, I have seen many Biriba' (Rollinia deliciosa / Annona mucosa) growing in in full sun, fruiting well. Many others were in a lot of shade on all their sides, from being planted too close to other trees; these mostly fruited very high up.

Great info, thanks. And right from the location of my sun baseline, too!

News:

Author Topic: Annona(ceae) productivity relative to sun (Read 3415 times)