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Messages - lebmung

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Some cold tolerant avocados are Fuerte and Bacon. They can stand -3C.
Fuerte you can buy in the shops sometimes, they are a good rootstock.
I have grafted plants, but I can't send plants outside EU. Maybe scions if you are interested, but not now, only during spring or fall.

I am looking for fresh seeds of Passiflora incarnata, I know they are not done yet.

Citrus General Discussion / Re: Ancient lemon cultivation?
« on: May 24, 2019, 08:46:11 AM »
Italians have a Mediterranean weather, which means perfect for citrus. even in northern Italy it's still possible to overwinter them in pots.
-Terracotta pots
-A good soil mix
-Soft water or rain water
-Prune the roots, prune the twigs
-Compost and manure

Tropical Fruit Discussion / Re: Geodesic dome greenhouse build
« on: May 23, 2019, 06:13:12 PM »
Plants will be leggy, internode length high. Tested. Especially tropical guava will not fruit well under 2 polycarbonate sheets.
You will get condensation and a lot of it. I tested before. After you fail with condensation, I might give you a good solution. Get some experience first.

Tropical Fruit Discussion / Re: sunshine seeds
« on: May 23, 2019, 05:59:55 PM »
All orders arrived pretty fast.

Citrus General Discussion / Re: Container Soil Mix.
« on: May 23, 2019, 05:55:21 PM »
Not a good idea to mist on pepper

Tropical Fruit Discussion / Re: Ripe figs in Germany in May
« on: May 23, 2019, 05:49:40 PM »
Some here. I think it's brown turkey, they make early fruits, especially under heat. other figs don't behave like this.

Citrus General Discussion / Re: Micropropagation
« on: May 23, 2019, 10:14:59 AM »
Thanks for the link.
It makes sense to make clean plants in a faster way such are rootstock or rare plants.
For me it might be a better option because in small place I can grow like 100 plants and I am not dependent on the weather from outside.
I still think that a mature stem with buds will not have a juvenile period. Like the research you mentioned:
regenerated plantlets from nodal segments of mature plants of Cleopatra mandarin, Carrizo citrange, Rangpur lime and sweet orange. Singh et al. (1994) have also regenerated plants from shoot tips
collected from mature plants of mandarin and lemon, based on morphological characters (thorniness, growth habit and internode length) the established plants did not appear to be juvenile.

Citrus General Discussion / Re: Micropropagation
« on: May 22, 2019, 07:23:28 PM »
Anyone willing to try to clone some trees also? I know the protocol and techniques. I will post more pictures here once I start. I am thinking to multiply Shiikuwasha as candidate for rootstock and Yuzu because it can do well on its own roots.

Global Seed Vault on Svalbard has no Citrus in its catalog.

I didn't check. I thought they had everything.

I'm trying with emerging the whole seed in water and I keep questioning myself every day if I should switch back to the paper towel method, anyone with some water sprouting experience?

Lack of oxygen will lead to death fast.

Citrus General Discussion / Re: Micropropagation
« on: May 21, 2019, 06:22:12 PM »
Research is limited or patented. What I read from some Indian research it seems like it does have a juvenile period about a half to a third of a normal seedling.
I guess stem shoot and buds might be a similar to a cutting.
Meristem and nurse techniques are in question. Even though the CCPP is using meristem to micrograft, I don't know how long doe it take.

They have all citrus seeds or all citrus plant material preserved?

Yes all citrus and most of the world plants are cryopreserved, plant organs or seed. The vault in Norway is the biggest in the world and it is meant to save plant material in case of a nuke war or other disaster. US and other governments have also national gene banks where they preserve the plants.
With the current worldwide environmental decline and climate change many species will disappear soon.

Citrus General Discussion / Re: Micropropagation
« on: May 20, 2019, 05:04:50 PM »
I know this doesn't qualify as micropropagation but I have had success rooting what was basically just a leaf (half a leaf actually, I cut it to reduce surface area) with just a very tiny amount of stem attached. It requires humidity and the right level of warmth, and I used some rooting hormone too.

SoCal2warm: This is way more advanced than rooting a mature plant organ using IBA growth regulator, so it doesn't qualify.

Tropical Fruit Discussion / Re: Geodesic dome greenhouse build
« on: May 20, 2019, 02:56:14 PM »
Well... You need a phisics lesson, not me. Google the air between two glass panels then we can talk. 5cm gap between panels is a bad idea.
You speak from theory I tell you from practice.
Anyway do as you wish you seem the kid of person who knows everything.

Citrus General Discussion / Micropropagation
« on: May 20, 2019, 01:05:17 PM »
Anyone with experience micropropagating citrus?
I am thinking to start some tests soon. My question is a cloned plant, does it have a juvenile stage?

Tropical Fruit Discussion / Re: Geodesic dome greenhouse build
« on: May 20, 2019, 01:01:13 PM »
You will have a lot of condensation with all the heating you will have. It will drop cold water on plants and fungus will develop. It seems like you never had a greenhouse before.
If you put double panels on both sides it will be expensive, and the air between the panels will have an inverse effect, because of the large gap in between. Not to mention the light loss.

The collection in kept in a gene bank cryopreserved, it will not disappear unless war comes. And even then there is a gene vault in Norway which has almost all citrus, unless nuke war comes. You never know!

Tropical Fruit Discussion / Re: Cutting the Top Off (Mango)
« on: May 20, 2019, 04:45:33 AM »
Yes in Florida but in a pot culture in Arizona would take double the time to recover during the winters and the very hot dry summers, plus difficulty of watering where too much water can lead to root rot.
Cutting back a mature wooden branch it will make very strong new shoots which will not produce flower
in the next year.

Tropical Fruit Discussion / Re: Cutting the Top Off (Mango)
« on: May 19, 2019, 05:22:13 PM »
You can cut from there, it will make a lot of sprouts however it will not fruit next year.
Don't cut lower is a bad idea you will cut all the sugar production and tree will need more than 2 years to recover.
A better approach it is to leave only two limbs and cut 10 inches above where you pointed leaving buds exposed. This way you don't miss the fruit next year.
I grow 8 mangoes varieties in containers and prune them yearly to dwarf them. Also for that tree size no more than 1-2 fruits per tree.

 I use 500 ppm as the lowest dose.What protocol are you talking? To mix the acid with alcohool or acetone first?

Acetone is very toxic to seeds

Tropical Fruit Discussion / Re: Carambola tree - hanged to death?
« on: May 19, 2019, 04:14:40 PM »
Let it grow, it will heal itself, not a big problem.

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: May 19, 2019, 04:11:43 PM »
I used an easy method, in the end of March I gathered fruit that had fallen in the autumn/early winter. After soaking them in water and squeezing/manipulating the fruits, the seeds separated from the pulp. I disinfected the seeds with Sodium  hypochlorite, then rinsed them and planted immediately. Due to recent cool temperatures, seedling emergence has only been evident for the last week. Germination appears to be satisfactory.

I prefer sow them in the fall, by the time spring comes they are 8-10 inches high, this way you extend the season to one year more, because PT stops growing at the end of September. A hormone mechanisms tell him to go dormant. Sodium hypochlorite is toxic and might kill some seeds I use peroxide.

Citrus General Discussion / Re: Oranges And Its Sugar Content
« on: May 17, 2019, 06:58:47 PM »
Interesting article.  However, that site could possible have set the record for cramming in as much advertising as possible.
It's a newspaper, actually a kind of tabloid.

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: May 17, 2019, 06:55:47 PM »
That is a lot of planting. Why do you sow in November when you get the seeds then you have 90% germination rate. This year I am planning also to sow 1000 seeds.

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