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If you want a real harvest from your indoor garden in the next two weeks, microgreens are your answer. If you want it in the next month, the answer expands. Here are the eight fastest-growing plants you can put in an indoor garden, ranked from 10 days to 6 weeks, with realistic expectations for each.
Key takeaways
- The fastest growing indoor plants run from microgreens (10-14 days) to lettuce and arugula (3-4 weeks) to basil and herbs (4-6 weeks).
- Microgreens are the gold standard for quick wins. Seed to plate in two weeks.
- Leafy greens (arugula, lettuce, spinach, tatsoi) are the fastest “regular vegetable” harvests.
- Continuous-harvest plants keep producing after the first pick, multiplying the return on your wait.
- An indoor system that handles light, water, and nutrients automatically eliminates the variables that slow outdoor growing.
Why indoor plants grow faster than outdoor ones
Outdoor plants run on weather. Cool nights slow growth, cloudy weeks reduce photosynthesis, irregular rain creates stress responses that pause development. Indoor growing under full-spectrum lights with consistent water and nutrients eliminates those variables. The plant is always in optimal conditions, so it grows on its biological maximum schedule rather than its weather-dependent one.
In practical terms: lettuce that takes 8 weeks to mature outdoors often hits the same size in 4 weeks in a Gardyn.
1. Microgreens (10-14 days)
Microgreens are the absolute fastest. Seed to harvest in 10 to 14 days for most varieties. The flavor is intensely concentrated (a single bite of microgreen broccoli can have more pronounced flavor than a full head of broccoli), and the harvest yield per square inch is enormous.
Best for: instant gratification, kid involvement, daily-use garnishes for eggs, sandwiches, salads, and tacos.
2. Arugula (3-4 weeks)
Arugula is the fastest leafy green at full size. First harvest at about 3 weeks, with continuous picking for another 2 to 3 months after that. The peppery flavor is at its best when harvested young.
Best for: salads, pizza topping, sandwich greens, pesto.
3. Lettuce (3-4 weeks)
Buttercrunch, romaine, red sails, and other lettuce varieties all hit first-harvest around 3 to 4 weeks. Pick outer leaves and the plant keeps producing for months.
Best for: daily salads, sandwich greens, lettuce wraps.
4. Bok choy (4-5 weeks)
Bok choy is one of the most underused fast crops. Tender, mild, and ready in 4 to 5 weeks. Use the whole plant in stir-fries, soups, or salads.
Best for: Asian cooking, quick stir-fries, soup additions.
5. Spinach (4-5 weeks)
Spinach is slightly slower than lettuce but produces a more nutrient-dense harvest. Pick outer leaves continuously once the plant is established.
Best for: salads, smoothies, sauteed sides, eggs.
| “Microgreens are the fastest way to produce real food from a seed in your house. Two weeks from planting to a plate of garnishes that taste better than anything in a grocery store.”
Gardyn test kitchen |
6. Basil (4-6 weeks)
Basil takes a bit longer to hit useful production volume but starts giving you small harvests at 4 weeks. By 6 weeks the plant is producing enough for regular cooking use. Continuous pinching keeps it producing for months.
Best for: pesto, caprese, tomato dishes, summer pasta.
7. Tatsoi and mustard greens (4-5 weeks)
Asian greens like tatsoi and green mustard mature fast and offer flavor variety beyond standard leafy greens.
Best for: salads, stir-fries, soup additions.
8. Chives and other quick herbs (5-6 weeks)
Chives, parsley, and cilantro all hit useful harvest size in 5 to 6 weeks. Slightly slower than basil but offering distinct flavor profiles.
Best for: finishing dishes, omelets, soups, baked potatoes.
How to stack quick wins for continuous harvest
The fastest path to continuous harvest is to plant in waves. Start with microgreens and arugula on day one. Add lettuce and bok choy in week 2. Add basil and tatsoi in week 3. By the end of week 4, you have microgreens producing, arugula and lettuce ready to pick, and basil developing. By week 6 you have everything in continuous production.
This approach turns an indoor garden from a single-harvest experience into a daily-harvest one, which is the actual value of the system.
| Start with the quickest wins
A Gardyn floor column produces microgreens in two weeks and full leafy greens in four. Memorial Day sale is on now. |
Frequently asked questions
What’s the fastest plant I can grow indoors?
Microgreens. Seed to harvest in 10 to 14 days for most varieties. Within a single calendar month you can grow and eat microgreens from three different plantings.
How long until I have a real salad from my garden?
Three to four weeks from planting an arugula or lettuce yCube to your first full salad-sized harvest. After that, the plant keeps producing for months.
Can I grow these faster in summer than winter?
Indoor growing under controlled light and temperature is largely season-independent. A Gardyn produces at the same speed in February as in July, which is one of the reasons indoor growing is valuable year-round.
Why does outdoor growing take so much longer?
Outdoor plants face weather variability (cold nights, cloudy weeks, irregular water). Each stress event slows growth. Indoor growing under optimal conditions runs plants at their biological maximum speed.
Will rushing plants compromise flavor or nutrition?
No. Plants grown under optimal conditions develop full flavor and nutrient density. The slow-growing outdoor version isn’t better because it’s slower; it’s slower because of environmental stress.
Can I do all of these in one Gardyn at the same time?
A Gardyn Home (30 plants) can run microgreens plus multiple yCubes of leafy greens, herbs, and even cherry tomatoes simultaneously. The Studio (16 plants) supports a smaller version of the same setup.