According to almanac tradition, asparagus is a root-type crop planted in the third quarter of the Moon, from full moon to last quarter. Combined with a fruitful or semi-fruitful Moon sign, that gives these traditional windows: March 22-26, 2027 (Moon in Libra/Scorpio), March 29 (Capricorn), April 21-22 (Scorpio), April 25-27 (Capricorn) and May 23-24 (Capricorn). No effect of the Moon on asparagus is proven.
What the tradition says about planting asparagus
The quarter rule
Almanacs sort crops into types, and asparagus lands in the “root” type, the group that also holds root crops, bulbs and perennials. Gardeners who plant by the Moon put that group in the ground during the third quarter. It is a custom, and nothing more. The wider tradition is laid out in our guide to planting by the moon.
The quarters come from the Moon’s phase cycle, which lasts 29.53 days according to the NASA Moon Fact Sheet. Cut that cycle into four and the almanac gives each piece its own job.
| Type | Quarter and phase | Crops the tradition names |
|---|---|---|
| Leaf | Quarter 1, new moon to first quarter | Leafy crops that bear above ground (lettuce, spinach, cabbage, broccoli, celery) |
| Fruit and seed | Quarter 2, first quarter to full moon | Above-ground crops that bear seed inside the fruit (tomatoes, peppers, beans, squash, corn) |
| Root (asparagus is here) | Quarter 3, full moon to last quarter | Root crops, bulbs, perennials (potatoes, carrots, garlic, onions, beets) |
The fourth quarter, last quarter to new moon, is a rest period in the almanac scheme. It is set aside for weeding, pruning, turning the soil and composting. The third quarter is also the waning half of the cycle, the stretch after the full moon.
The sign filter
Many almanacs add a second filter, the zodiac sign the Moon is passing through. This convention labels Cancer, Scorpio and Pisces fruitful, and Taurus, Libra and Capricorn semi-fruitful. Aries, Gemini, Leo, Virgo, Sagittarius and Aquarius are labeled barren, though sources differ on Virgo, Sagittarius and Aquarius. The traditional days on this page need the third quarter and a fruitful or semi-fruitful sign together.
Now the part that keeps this in the “tradition” column. The Moon’s tidal pull at the Earth’s surface peaks at about 1.1 millionths of a meter per second squared, roughly one ten-millionth of gravity (1.1 x 10-7 g). That is far too small to move anything as small as a seed or a root. Whatever draws people to the practice, a measured physical push is not it.
Traditional asparagus planting days, 2026 and 2027
The calendar
| Month | Traditional days for root-type crops, with the Moon sign |
|---|---|
| March 2027 | March 22-26 (Moon in Libra/Scorpio), March 29 (Moon in Capricorn) |
| April 2027 | April 21-22 (Moon in Scorpio), April 25-27 (Moon in Capricorn) |
| May 2027 | May 23-24 (Moon in Capricorn) |
The months in the table are those when gardeners in much of the country plant asparagus. Your state may start earlier or later, so only the rows that fall inside your state’s own window count. Days are read at noon ET and the Moon changes sign during the day, so treat the first and last day of each run as soft edges.
Reading the sign column
Notice the first row. The Moon passes from Libra into Scorpio during the March 22-26 run, which is why both signs appear. Under the labels above, Libra is semi-fruitful and Scorpio is fruitful, so the whole run qualifies. The Capricorn entries are semi-fruitful in that same convention.
A different tradition reads the signs another way. The biodynamic system associated with Maria Thun groups days into root, flower, leaf and fruit days. Its root days are Taurus, Virgo and Capricorn. A gardener who follows that system for a root-type crop would look only at the rows where the Moon is in Capricorn and ignore Libra and Scorpio. Neither reading is verified, and the two do not always agree, which tells you something about how settled the custom really is.
Five runs across three months is a short list. That is the nature of stacking two filters, a quarter and a sign class. Each filter removes days, and what remains is a handful of windows rather than a long stretch of the calendar.
Check your state first: when to plant asparagus where you live
Start with the state calendar
The order of decisions matters more than any date in the table above. First comes your state’s planting calendar for asparagus. Then, only if you want it, comes the Moon.
The Moon never overrides the calendar of the place. Frost dates and soil temperature decide whether a crop can go in the ground. The Moon, if you follow it, only chooses among days that are already open to you.
Our page on when to plant asparagus where you live owns the practical side: planting windows, soil conditions and the local timing questions. This article deliberately leaves those out, because a Moon table cannot know whether your ground is ready.
Then lay the Moon over it
Our state guides collect the calendars place by place. For an example of what a state-level page looks like, see the Ohio planting calendar for asparagus. Find your own state, note the window it gives, and then look at the table above.
Some rows may fall entirely outside your window and can simply be skipped. Others may fall partly inside it. When a run overlaps your state’s window only in part, use the portion that sits inside and remember that the first and last days of a run are soft edges anyway.
If no row overlaps your window at all, the Moon has no say that year. Planting on a day your state calendar supports is the sounder call than stretching the almanac to fit. The tradition is optional. The calendar of the place is not.
A fair way to try it
Curious whether the custom shows anything on your own plot? There is one honest way for a home gardener to find out, and it takes a little bookkeeping.
- Split your asparagus planting in two. Put half in the ground on a traditional day from the table, and the other half on an ordinary day inside the same week, with both dates inside your state’s planting window.
- Keep everything else the same: planting stock, depth, spacing, soil, sun and watering. The Moon date should be the only difference.
- Label both groups with a stake or tag showing the planting date and which group it belongs to.
- Write down when each group first emerges, and later what you harvest from each.
One season will not settle anything. Weather, a patch of heavier soil or a stray bit of shade can easily swamp whatever the Moon might do. A real answer would take several seasons of matched plantings, and even then it would only speak for your plot.
Still, this is the only way a home gardener can judge the custom for themselves. Reading more almanacs will not do it, and neither will arguing over signs.
Questions about planting asparagus by the moon
Does the tradition say to plant asparagus in a waxing or a waning moon?
According to almanac tradition, root-type crops go in during the third quarter, which falls in the waning half of the cycle. That runs from full moon to last quarter. Our page on planting in a waning moon covers that phase in more detail. The waxing quarters belong to leaf and fruit crops in this scheme.
What if the traditional day falls on a frost?
The tradition says nothing about frost, because it is a calendar of lunar days and not of local weather. If a traditional day lands somewhere your state’s calendar rules out, the almanac rule gives way. Gardeners who plant by the Moon in that situation wait for the next run in the table, or drop the custom for that year.
Do I need to follow the Moon sign as well?
No. The sign is a second, optional layer that some almanacs add to the quarter rule. The windows in the table above require both, a third-quarter Moon and a fruitful or semi-fruitful sign. A gardener who follows only the quarter would have more days to choose from, and this page does not list them. Sources also differ on how to label Virgo, Sagittarius and Aquarius, so two almanacs can disagree about the same afternoon.