Tropical Fruit Forum - International Tropical Fruit Growers

Citrus => Citrus General Discussion => Topic started by: Florian on August 28, 2017, 10:07:29 AM

Title: Large spines on second growth
Post by: Florian on August 28, 2017, 10:07:29 AM
I've noticed that some of my citrus plants grow unusually large spines on their second flush and well, I wonder why. Any ideas?
It is the first time my seed-grown Poncirus does it whereas my ichangensis x sinensis has done it before.

Poncirus
(https://s11.postimg.cc/4ztevqw2n/20170823_120024.jpg) (https://postimg.cc/image/4ztevqw2n/)

C. ichangensis x sinensis
(https://s11.postimg.cc/7if3wfhsv/20170827_191802.jpg) (https://postimg.cc/image/7if3wfhsv/)
Title: Re: Large spines on second growth
Post by: Ilya11 on August 28, 2017, 11:39:50 AM
It is normal, thet could be even longer.
Title: Re: Large spines on second growth
Post by: Millet on August 28, 2017, 02:52:16 PM
Most all immature seedlings have spines. The spines will continue to grow on all new growth until the tree reaches a height enough to become a mature tree.
Title: Re: Large spines on second growth
Post by: Florian on August 29, 2017, 01:17:30 AM
Ok, I was just wondering why they were much larger than on the branches that were grown in spring.
Title: Re: Large spines on second growth
Post by: Ilya11 on August 29, 2017, 04:15:48 AM
The quicker is growth, the larger are the spines.
Title: Re: Large spines on second growth
Post by: Citradia on August 29, 2017, 03:09:35 PM
I think poncyrus is thorny forever no matter how old tree is. Fruiting poncyrus I've seen are large and thorny as all get out.
Title: Re: Large spines on second growth
Post by: Florian on August 31, 2017, 05:54:22 AM
Yes, Poncirus is always thorny but usually they are much smaller.