Our new asparagus bed

First of all, I apologize for being a bit late with this week's blog entry. But as you'll soon see, there's a good reason for it. 

For several years, our asparagus crop has been steadily shrinking. In fact, checking over my posts, I see that it's been ten years since we last celebrated the May 1 Gardeners' Holiday as the Age of Asparagus, largely because there just hasn't been enough asparagus to celebrate. For the past couple of years, we've harvested barely enough for one meal. And so far this year, we've had no spears at all big enough to pick. Our mature plants have produced only tiny, spindly fronds, and as far as we can tell, none of the ten new asparagus crowns we added to the bed last year have put up any shoots at all.

In light of this, I suggested maybe we it was time to do what we considered doing last year: dig up the entire asparagus bed and start over from scratch. Brian agreed that might be a good idea, but he wondered whether we should consider starting over in a different location. In the first place, our current asparagus patch had never been all that productive, and in the second place, it was likely to get torn up at some spot to put in the condenser for a heat pump system when we finally got around to installing one. So if we had to put in a whole new bed, why not put it in a new location where we'd know it wouldn't be disturbed?

Well, it was a nice idea in theory, but there was one obvious problem: asparagus likes a well-drained, even sandy soil. The current asparagus bed has the only soil on our property with even a little bit of sand in it. If the asparagus plants didn't like that, they'd really hate the heavy clay in the rest of our yard. The only way around this that we could think of would be to build a raised bed and fill it with a more asparagus-friendly soil mixture.

I knew this was possible, because I'd recently seen a GrowVeg video that discussed the advantages of planting asparagus in raised beds. However, it didn't go into much detail about how to construct one. Digging a little deeper, I found this article at Garden Betty, which talked more about how to build the bed and how to plant and tend the asparagus for optimal growth. (One thing it recommended was a phosphorus-rich organic fertilizer, something we'd never used on our current asparagus patch, which might explain its lackluster production.) But it also called attention to one key point: asparagus crowns are only available for sale in stores for a short period in the springtime. So, if we really wanted to do this, we'd have to do it as soon as possible.

Since I already had my monthly Citizens' Climate Lobby meeting to attend in Somerville on Saturday, we decided to combine that trip with a visit to the Belle Mead Co-Op for asparagus crowns and bulk soil. That gave us just a few days to plan out the location and design for the new raised bed. We decided the best spot for it would be the area in front of the shed, which is relatively level and gets sunlight for most of the day. In that location, we'd have room for a 4-foot square bed without blocking off our access to the shed, the main garden, or the cherry bushes. After a little tinkering, Brian determined that he could build a 4-foot square frame roughly 17 inches deep entirely out of reclaimed materials: two large boards we'd recently scavenged off the curb and a bunch of narrower pieces trimmed off from the stack of wood pallets stored in the shed. He started constructing it on Friday and had it finished by Saturday morning, just in time for our trip to the Co-Op. 

We'd already called the Co-Op ahead of time and found that they had several varieties of asparagus in stock, including the highly recommended Jersey Knight and Millennium varieties. We planned to get one 10-pack of each, allowing us to plant eight of each variety in our 4-by-4 bed with a few to spare. When we got there, we found that there were two different bundles of Millennium crowns available: one-year old crowns for $10 or two-year-old ones for $20. We decided to spend the extra $10 in hopes that we'd be able to harvest at least a little asparagus from our new bed next year. 

Next on our shopping list was soil. Garden Betty recommended using a "well-draining soil" and amending it with 2 inches of "well-aged compost." To simplify things, we opted for the Co-Op's blended topsoil, which has compost and sand already mixed in. The Co-Op's website suggested amending this mixture for raised beds with a bagged product called Bumper Crop, so we added a couple of bags of that to our order, along with one bag of an organic fertilizer called Bulb-Tone that Garden Betty recommended. The total came to $129, probably the most we'd spent on any garden project since we bought our fruit trees 13 years ago, but like them, this is a long-term investment.

Loading the half-yard of topsoil we'd purchased was a lot more work than we expected. We've bought bulk compost and mulch from the Co-Op enough times to have the drill pretty well down: Dump out our half-yard into our two big trash barrels, muscle those into the car, then shovel up the rest into bags and load those. But the topsoil was much denser than either mulch or compost, and the filled barrels were far too heavy for us to lift or even drag. We had to shovel about half the dirt out of them before we could get them into the car, and even then it took all our combined strength. And although we filled the bags only about halfway full, they were still too heavy for me to lift more than an inch or two. Brian had to heave them all into the car, and then, with still more difficulty, heave them back out again. To haul them down to the back yard, we dragged out the wheelbarrow and the ramp we hadn't used since our patio project in 2013, but even hefting the bags up into the wheelbarrow was a challenge. By the time we'd finished shifting everything, we didn't have the energy to do more than change clothes, eat supper, and collapse on the couch to watch Critical Role.

On Sunday afternoon, we began preparing the bed for planting. First, we toted the frame Brian had built down to the spot we'd picked for it in the yard (popping one side loose in the process, which he had to reattach). We carefully adjusted it until we were satisfied, then set a brick at each corner to marked out its exact position. After that, we moved the frame out of the way so Brian could go all the way around the edges of the square with our King of Spades, cutting a line to mark the boundaries of the new bed. He then used the same tool to score horizontal and vertical lines across the bed, dividing the sod into squares. We removed these squares one at a time, whacking each one with a trowel to shake the clods of dirt loose from the grass roots so none of it would go to waste before dumping the grass into a bucket bound for the compost bin. 

When all the sod had been turfed up, we shifted the frame back into place. It wasn't quite level, so we scooted it over just a bit and Brian dug the hole a bit deeper along one edge to get it situated securely. Then he made one more adjustment to the frame: stapling a layer of cardboard to the inside so that none of our precious soil would escape through the cracks. On this cardboard layer, he used a Sharpie to mark three lines at the center of each side of the bed, at 8, 5, and 2 inches below the top edge. The first mark showed the level to which we'd need to fill the bed before placing the crowns; the second showed the level to which we should pile additional dirt on top of them; and the third showed how much more dirt we'd need to add later in the season, once the spears had started to sprout. The remaining two inches would be for a layer of mulch on top to protect the plants during the winter. He also marked off one-foot lengths along the top edges of the bed as a guide to help us place the asparagus crowns.

That, once again, proved to be all the work we could handle for one day, so it wasn't until this morning that we started actually filling up the beds (which is also why this blog entry was delayed). Since we weren't sure our half-yard of soil would be quite enough to fill them to the level needed, we started by adding a layer of sticks, as recommended in this other GrowVeg video. Aside from adding bulk, they'll help the soil in the bed drain more easily, and they'll break down over time to release their nutrients into the soil. On top of that, we began adding the actual dirt—first shoveling it out of the big bins until they were light enough to tip out, then dumping in about five bags' worth on top of that until we'd nearly reached the first mark. Then we dumped in one of the two bags of Bumper Crop and, following the instructions on the package, worked it into the soil to a depth of about six inches.

Once we'd reached this point, we were ready to start the actual planting. First, on Garden Betty's advice, we soaked the asparagus crowns in a bucket of water for about 15 minutes to rehydrate them. While they were soaking, we opened up the package of Bulb-Tone, sprinkled three cups of it across the soil surface, and lightly worked it in with our fingers. Then we carefully laid out the asparagus crowns according to the Brian's guidelines, one per square foot, with the two-year-old Millennium crowns toward the front of the bed and the younger Jersey Knight crowns in back. 

Finally, we topped up the bed to Brian's second level marker with a mixture of soil and some more of the Bumper Crop and gave the freshly planted asparagus a good watering. Our sources said it would need 1 to 2 inches of water every week for its first couple of years, which Brian worked out to be 10 to 20 gallons—about five full watering cans' worth. However, we found the soil was looking pretty well saturated after three cans full, so we decided to leave it at that and top it off later.

After learning how much water the plants would need, Brian decided to add one more thing to the new asparagus patch: a rain gauge. The standard design for this is simply a plastic bottle with the top cut off and inverted to funnel rainwater into the opening, with lines marked on the outside to show how many inches of rain you've had. Sources like Wikihow suggest adding pebbles to the bottom to keep it from tipping over, but Brian decided to get a little fancier and use some of the colorful marbles we'd both saved from our childhood. He did a little measuring to figure out how much water the marbles would displace and adjusted the marks on the side accordingly. The new rain gauge now sits on a corner of the bed, so we can see at a glance how much water the plants have had and calculate how much they still need.

Although it was a lot of work, I'm extremely pleased with our new asparagus bed. I like the fact that Brian built it himself. I like the fact that he used only salvaged materials. I like the fact that we assembled it together (even if he did most of the literal heavy lifting). And I like the fact that, having planted it once, we can expect to continue harvesting asparagus from it from the next 15 to 20 years. Granted, at around $3 per pound for in-season asparagus, it will need to produce 43 pounds to pay for all the material that went into it, but that's less than three ounces per plant per year. I think we can hope to at least break even, and one thing we can be sure of is that any asparagus we do get will be far fresher than anything we could buy at the store. And if asparagus proves to be one of the commodities that skyrockets in price due to tariffs or global instability, we'll be at least somewhat insulated from the shock.