Wednesday, December 19, 2012
2012 Derwood Demo Garden wrap-up
I should probably post this before 2012 is over!
Overall, we had a good year in the vegetable beds of the Derwood Demo Garden in Montgomery County, MD. Our main focus for the year was to produce a successful harvest of certain crops (beans, cucumbers, melons, squash, tomatoes, leafy greens) while, as always, trying out a few new plants. Here's a quick summary of what went well and what didn't, and why.
I'm also still very fond of Masai bush beans, which produce quickly and fairly heavily on extra small plants. And our purple pole beans were lovely and moderately productive.
Tomatoes produced very well until mid-August when the BMSBs moved in. After that, we harvested barely a tomato worth eating. An early-season experiment with covering plants with a lightweight mesh had to be discontinued when the plants outgrew the size of the fabric (note: do this with smaller plants next time) and started showing damage due to shading and overcrowding. Then the stink bugs got 'em. We participated in a stink bug trap trial that I believe has been judged not to be a success - at least in our case, we seemed to have more bugs on the plants near the trap than elsewhere.
I'm going to lump cucumbers, melon and squash together because none of them did very well. We made an attempt to distract cucumber beetles by planting cucumbers in a bed with many herbs and flowering plants, which, um, were a little too aggressive and overwhelmed the cucumbers (which showed signs of bug damage anyway). I am planning to give County Fair another trial next year, since it is supposed to be resistant to bacterial wilt spread by cucumber beetles.
Another experiment using reflective mulch under the cucumber plants to confuse the bugs wasn't much of a success either; it may have helped in the early stages, but once the plants grow tall it has no impact, and the bugs just keep coming all season. (Covering plants in young stages is ineffective for the same reason.) We'll keep working on the cucumber beetle problem, but I suspect frequent succession planting may be the best solution. Nearly all of our plants produced some cucumbers before they succumbed to disease.
Melons: pretty much ditto, except that we had even fewer fruit. We did not do enough with vertical structures, however; it really should help to get the vines off the ground.
Our late-spring-planted squash plants, both summer and winter, were all killed off by squash vine borers, despite foil wrapping the stems. Next year I plan to: wrap the stems better, with fabric instead of foil; pile mulch around some of the stems as a trial; plant good old Zucchetta Tromboncino, the huge-vined huge-fruited squash I've never lost a plant of (we did lose butternut this year, though, which should also be resistant to vine borers). We had no success with a June planting, which used to be the solution to the borer problem; now they are producing a second generation to attack late-planted squash. However, we did get some fruit from a mid-August planting of seedlings started in July: success through procrastination!
Let's face it; we have a serious cucurbit bug problem in the Derwood Demo Garden. Next year we need to focus on combating these pests by every organic means possible. One of our biggest problems is time - we're just not there in the garden often enough, but there is only so much we can do about that.
Squash bugs were controlled fairly well through crushing of egg masses and some hand-picking of adults.
We did note that our Tuscan kale (or Lacinato or Dinosaur), perhaps because of its non-bitter flavor or its bluish color, was the least attractive to harlequin bugs, not attacked until everything else was gone. However, the cabbage worms liked it fine, so I'd still suggest keeping it under cover. Too bad, since it is SO PRETTY.
No rabbit problems with greens or beans this year, thanks to our intrepid fence team led by Tom Maxwell! Yay!
Our biggest hits of the year were the roselle hibiscus or Jamaican sorrel, used for the flowers and leaves, and the yacon, enormous plants that produce delicious crunchy edible tubers in fall. (Pop those into the search box if you want to read more about them.)
For the second year in a row we have failed to produce much in the way of okra, which used to be a foolproof crop that loves our heat and humidity and usually gives us many more pods than we want to eat. This is especially odd since it is related to the above-mentioned hibiscus, which did extremely well. However, the okra plants were strangely short and sickly and died young. Perhaps the seed was too old? I will try again next year with brand-new seed.
This is a very quick summary written in a hurry before a holiday trip; I apologize, but I'll try to discuss details in the comments if anyone has questions.