Jeff, can you give us a picture of the tree? Your location would be helpful, too.

Hi all As Dave61 rightly notes, pretty much all cactus fruit are technically edible, but most range from bland to tasteless to unpleasant. Nevertheless there are a large number of cactus fruits that range from passably good to utterly delicious. Most will be at their best when just fully ripe, and often ferment or dry out soon afterward, so strike while the iron is hot. Perhaps the most commonly grown cacti with edible fruits are some of the Mammillarias. These fruits are often quite small, though in a few they can be the size of a nice plump raisin. One of the most commonly available species with tasty fruits is Mammillaria prolifera. Like the much larger but harder to find and to grow, fruits of some species of Echinocactus, the fruits of M. prolifera have a strawberry flavor. They are ready when they turn red, and once they start to shrivel may be past their prime. One wellgrown plant may yield scores of fruits in a summer. As to pollination, the majority of cacti are what are called "obligate outcrossers", that is, a clone cannot fertilize itself but must be crossed with a genetically different clone of the same species. Of course, in a house there would be no pollinators anyhow (though one might try hand pollination); and for fruit production, it is likely that if you have more than one plant of a similar sort, even if not the same species, they may still be crossable, at least to produce fruit. So if you have a Mammillaria crinita and a Mammillaria prolifera in bloom together (or a gracilis, or whathaveyou) and you want fruit, try using a small brush or Q-tip to transfer pollen from one plant onto the stigmas of the flowers in another... choosing the stronger plant to receive the pollen. Here in Florida we have a number of large cereoid cacti that grow in yards, the most common being Cereus repandus (syn Cereus peruvianus), whose large red fruits are quite tasty (the red rind is tough but the white pulp, laced with tiny black seeds, is excellent). And many of the local prickly pears, too, have nice fruits. (The Santa Rita and some other ornamental ones, alas, have dry or leathery fruits not very good for consumption.) Bon appetit! John in St Petersburg

No, It is jst a standard NPK in soluble form with the additionof micronutrients . None of the micros are harmful to common plants.

Dave's Garden has a nice section on edible palm fruits at http://davesgarden.com/guides/articles/view/3242/ Here's a quote: "If you want to be absolutely accurate, almost all palm fruits are edible, though I would not really recommend eating most of them. Some are toxic however, and have high levels of oxalates in them so these are palm fruits that definitely should be avoided" unfortunately, the king palm isn't listed there one way or the other. http://www.junglemusic.net/Palm_Seeds_and_Fruit/Palm_Tree_Seeds_and_Fruit.html has a list of edible palm seeds near the end of the page, but also doesn't list the King Palm. They point out that some edible palms produce "fruit" where you eat the fleshy seed coating, like dates; others produce "nuts" where you eat the inside of the seed, like coconut. http://www.crfg.org/pubs/ff/edible-palms.html lists edible hardy palm fruits, but doesn't mention King palm. So, not sure if they're edible. I would guess that they're probably neither pleasant nor toxic to eat, or there would be more info about them.