Rx Please Sago Doctors

deerwood-cottage(6-7)March 8, 2010

Advice on this forum accounts for most of what I know about cycads--thanks for your contributions.

As you can see from photo album link below, some of my sagos did not winter well indoors. Live in Tennessee; take in Thanksgiving, out early March. Stored in upstairs room that's heated, fairly bright (dormers and skylights) and 40% humidity via humidifier. Before taking indoors, spray with Neem.

Lowest fronds on two large sagos (pix 1-4) typically turn brown indoors. But this winter they have more extensive browning and a brown scale (see detail, pix 5). Some of the other sagos in same space (pix 6,7,8) came through fine with much less scale.

What did I do wrong please? And how should I treat now? Advice much appreciated in advance. Sagos March 2010

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Cycas revoluta is not the easiest plant to overwinter inside the house. I have several, larger ones and due to size and space requirements (they're also very prickly), overwinter mine in a big garage (from mid-December to early March). Their January temps range from 34-50, February 34-55. I may water them once over the course of the Winter. Under these conditions they do not get scale or mealy bugs, nor do their leaves yellow. Your sago pics don't look that bad. Cut off the dead leaves and try to get them out as soon as you can. I just got mine out yesterday. I get mine OUT as soon as temps stay above about 30 F as overnight lowest temps. Data that show they can tolerate down to about 15 F. is for in-the-ground (mulched) plants and I am conservative about temps when we're talking about a containerized plant (as soil temps are much colder for containers as compared to the ground).
Also, when you do put your out, place in deep shade first and gradually increase their exposure to direct sun (oherwise they will burn). I basically give these guys direct sun with some degree of protection for the hottest sun.--Mine get a bit of shading being under a strand of pruned Canadian hemlocks. Had some of these guys for over 20 years now and they are getting massive!

    Bookmark   March 8, 2010 at 4:55PM
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Appreciate your advice njoasis. I have an unheated but insulated space like your garage. Haven't used it because I worried sagos wouldn't get enough light from small windows. How much light does your garage provide please? And how soon do you fertilize after putting outside in March? Many thanks again.

    Bookmark   March 8, 2010 at 7:40PM
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The best way to destroy the scale insects is with used Coffee grounds spray. I found this trick in www.cycad.org/documents/Broome-Coffee-2007.pdf

It worked for me like a magic.

    Bookmark   August 19, 2011 at 1:11AM
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