Jesus said, “How shall we picture the kingdom of God, or by what parable shall we present it? It is like a mustard seed, which, when sown upon the soil, though it is smaller than all the seeds that are upon the soil, yet when it is sown, it grows up and becomes larger than all the garden plants and forms large branches; so that the birds of the air can come and nest under its shade.” Mark 4:30-32

Are mustard plants in Israel larger than here. I've seen on-line everything from a small bush to a large tree used to depict what the mustard seed grows into. Commentary says it is 15ft tall. So what is this really.

  • It is said to be Salvadora persica, also toothbrush tree, and mustard tree, according to a webpage. It can grow into 6–7 metres (20–23 ft) in height.
    – Tim
    Commented Jun 18 at 9:33

5 Answers 5


It may likely grow into the Sinapis Nigra (Black Mustard). It can grow to eight feet tall, so it could actually be literally used by small birds to nest on its branches. However parables are not to be taken so literally and the image may be a slight exaggeration as part in parcel with the point of the passage.

In the OT mustard is not mentioned. Yet later Jewish lit. shows that it was well-known in Palestine (Hbr. חַרְדָּל, Aram. חַרְדְּלָא, Arab. chardal), → n. 10. Acc. to the Mishnah (in contrast to → line 10) it was not cultivated in gardens but in fields, Kil., 3, 2; cf. 2, 9. It was grown both for the grains (T. Maas., III, 7 [84]) and also the leaves, loc. cit.; T. Kil., II, 8 [75]). There is no ref. to medical use. The smallness of the seed was proverbial. In some rules of cleanness the slightest quantity defiles, “even as little as a grain of mustard-seed,” Nid., 5, 2; cf. b. Ber., 31a.…to-day the mustard does in fact grow to a height of 2 1/2–3 metres in the vicinity of Lake Gennesaret. (Vol. 7: Theological dictionary of the New Testament. 1964- (G. Kittel, G. W. Bromiley & G. Friedrich, Ed.)

Alfred Edersheim further vindicates that the mustard seed was not a tree but a garden herb that was quite large compared to the small size of its seed. Also that it was proverbial in Jewish culture:

The very idea of Parables implies, not strict scientific accuracy, but popular pictorialness. It is characteristic of them to present vivid sketches that appeal to the popular mind, and exhibit such analogies of higher truths as can be readily perceived by all. Those addressed were not to weigh every detail, either logically or scientifically, but at once to recognise the aptness of the illustration as presented to the popular mind. Thus, as regards the first of these two Parables, the seed of the mustard-plant passed in popular parlance as the smallest of seeds. In fact, the expression, ‘small as a mustard-seed,’ had become proverbial, and was used, not only by our Lord, but frequently by the Rabbis, to indicate the smallest amount, such as the least drop of blood, the least defilement, or the smallest remnant of sun-glow in the sky. ‘But when it is grown, it is greater than the garden-herbs.’ Indeed, it looks no longer like a large garden-herb or shrub, but ‘becomes,’ or rather, appears like, ‘a tree’—as St. Luke puts it, ‘a great tree,’ of course, not in comparison with other trees, but with garden-shrubs. Such growth of the mustard seed was also a fact well known at the time, and, indeed, still observed in the East. (The Life and Times of Jesus the Messiah)

The main point of the parable is that under such small beginnings the kingdom of God in Christ will expand disproportionately to its original 'small' size. History has borne the truthfulness of the parable out quite evidentially.

  • 3
    I thought the picture upon which the analogy is based is soundly rooted in reality, whereas, the truths that are conveyed through them are where we must not expect every detail to carry over. Thus I would expect the details of the picture itself to be correct, the small seed grows to a large plant under whose branches bird nest.
    – user2027
    Commented Mar 14, 2013 at 16:48
  • @Sarah - It is soundly rooted in reality. It is not an exaggeration. I meant it is 'highlighting' the greatness of a 'garden plant' that starts out the smallest and is bigger than the rest. Whenever something is 'highlighted' it is exaggerated just a bit. For example, a palm tree makes a mustard plant look small. However, the average person knew as a household truth that the mustard seed was so small and they new in their garden's how big it was, that even birds literally 'in reality' nested in them. Lazarus looking into heaven 'seeing Abraham' is not real, but this plant is.
    – Mike
    Commented Mar 14, 2013 at 23:10
  • Jesus wasn’t comparing the mustard seed to all other seeds in the world, but just to the seeds that a local Galilean farmer might have “sowed in his field,” so it’s absolutely true that the black mustard seed was the smallest seed ever sown by a first-century farmer in that part of the world. Obviously, Jesus wasn’t trying to provide a botany lesson to the rural Galileans, but he was matching an example from their everyday experience with an image of the kingdom of the heavens. His audience knew that mustard plants don’t grow into trees, but in the parable, this one somehow did.
    – Dieter
    Commented May 22 at 19:21

Meaning of κόκκῳ σινάπεως

This is more or less just some additional information, Mike's answer is good. According to the IVP NT Commentary series:

Scholars still dispute what plant is meant by the “mustard seed.” Nevertheless, by no conjecture is it the smallest of all seeds that Jesus’ listeners could have known (the orchid seed is smaller); the point is that it was recognized as very small and yet yielded a large shrub. Around the Sea of Galilee, it can reach a height of ten feet and has sometimes reached fifteen feet. Its usual height, however, is about four feet; because it would grow anew each year, birds could not nest in it when they built nests in early spring. The hyperbole Jesus applies to the best image of growth from tiny to large he had available does not change the point, however; the kingdom might begin in obscurity, but it would culminate in glory. Even if birds could not nest in the mustard plant, they could perch in it (Matthew’s term here was sometimes used that way); Matthew’s language here alludes to Daniel 4:12, the splendor of another ruler’s kingdom. Sources suggest that Palestinian custom relegated mustard seeds to fields rather than gardens; one may thus contrast Matthew 13:31 with Luke 13:19, each adjusting the image for their respective readerships.1

James Brooks affirms this assertion and also refutes an alternate interpretation of this parable:

Some have questioned, however, whether the growth depicted by the parable is desirable. They have claimed that an abnormally large herb with its branches filled with birds (sometimes symbols of evil) represents an overgrown, apostate, institutional church. Such an interpretation is, however, completely at odds with the meaning of the parables of the soil and the seed and the meaning of the term “kingdom of God.” Furthermore, growth is not the main emphasis; contrast between the beginning and the end is the main point of comparison. It is barely possible that the birds represent the inclusion of the Gentiles. In Dan 4:10–12 and Ezek 31:3–14 a tree symbolizes a foreign empire; and birds, those who enjoy its protection. In Ezek 17:22–24 the tree symbolizes restored Israel, and the birds symbolize those who enjoy its blessing.2

1 Craig S. Keener, The IVP Bible Background Commentary: New Testament (Downers Grove, IL: InterVarsity Press, 1993), Mt 13:31–32.

2 James A. Brooks, vol. 23, Mark, The New American Commentary (Nashville: Broadman & Holman Publishers, 1991), 85-86.


I think this parable means something totally different. A previous parable about the Parable of the Sower explains the 'birds' as the evil ones (Matt 13:19). Idioms in the Bible are consistent. Therefore, the mustard seeds starts in faith then something happens (false teaching - birds being evil ones, false preaching) and it becomes something that it was not intended to be, something corrupt. Mustard bushes are small; they do not grow into trees where birds can nest in. This parable is a warning of what happens to churches, fellowships, where they do not adhere to the Word of God but allow false teaching to come in.

  • 1
    Agreed. The parable of the Leaven follows which denotes falsity. Commented Sep 16, 2018 at 16:13
  • No, the point about birds perching in the branches (Luke 13:19) is intended solely to emphasise the size of plant the seed grows into, in comparison with its humble 'smallest of all seeds' beginnings. Mike's main point is soundly made.
    – Richard
    Commented Mar 10, 2021 at 9:35

I believe the question at hand to be, what is the hermeneutic of the writer of the Mustard seed parable found in Mark 4:30-32, using allegory to depict by the use of comparison, the kingdom of God? Whether Mustard or not may not be important, but let's call it Mustard and agree its seed is small. In those times something small, like any number of seeds, must have been a mystery awed by people how it came to change to something so complex, disproportionate in size, hearty and self-sustaining, self-perpetuating, and useful. The writer believes, to illustrate the kingdom of God, Jesus uses simple common knowledge understood by people through metaphor to reveal the unimaginable, bountiful and boundless kingdom of God. Like the Mustard, the sowing of knowledge of the kingdom of God is the writer's reason and purpose for Jesus' teaching. It is to illustrate to "...those outside..." by simile with what they are familiar and suggesting they too can begin to grow, like a seed, to understand the same miraculous qualities found in the kingdom of God.


What does a mustard seed grow into?

The Parable of the Mustard Seed

31 "He put before them another parable: “The kingdom of heaven is like a mustard seed that someone took and sowed in his field; 32 it is the smallest of all the seeds, but when it has grown it is the greatest of shrubs and becomes a tree, so that the birds of the air come and make nests in its branches.”

The mustard seed is one of the tiniest seeds and in the parable represents "The Kingdom of Heaven", the sowing of it, represents the preaching of the good news .

(Luke 4:43 (NRSV)

43 "But he said to them, “I must proclaim the good news of the kingdom of God to the other cities also; for I was sent for this purpose.”

The Christian congregation had its tiniest beginnings in 33 C.E., but within a few decades the growth was rapid and the congregation grew to such an extend, that Paul was able to say, that the gospel was proclaimed to every creature under heaven.

Colossians 1:23 (NRSV)

23 "Provided that you continue securely established and steadfast in the faith, without shifting from the hope promised by the gospel that you heard, which has been proclaimed to every creature under heaven. I, Paul, became a servant of this gospel."

The birds represent persons ,that accepted the gospel or spiritual food, and find shelter and protection within the Christian congregation.

Regarding the Messianic King , Jesus, Ezekiel wrote.

Ezekiel 17:23 Amplified Bible (AMP)

23 "I will plant it on the mountain heights of Israel, that it may grow boughs and bear fruit and be a noble and stately cedar. And birds of every kind will live under it; they will nest [securely] in the shade of its branches."