What it is
Texas Bluebonnet (Lupinus texensis) is in the Fabaceae (Legume) family. The state flower. Sow seed in fall, let it overwinter, and watch the spring fields turn blue.
How to grow it
It wants full sun, water it low, and give it lean, alkaline, well-drained soil. Target a soil pH around 6.8–7.5. Space plants about Broadcast apart. Expect roughly Fall sow, spring bloom. Native winter annual.
How it's used
Texas Bluebonnet is used: ornamental; nitrogen-fixer.
🔎 How to identify it
- Palmate leaves (five+ leaflets)
- Blue flower spikes, white tip
- Fuzzy seed pods
Not for eating
How to grow & propagate texas bluebonnet
Everything I've worked out about starting this one, keeping it alive through a Texas year, and turning one plant into many — free.
How to propagate texas bluebonnet
Legumes resent transplanting — that taproot wants to go straight down — so sow them right where they'll grow once the soil has warmed. Soak hard-coated seed overnight to speed germination. As a bonus, this whole family pulls nitrogen out of the air and banks it in the soil, so wherever you grow them you're feeding next season's crop.
Growing texas bluebonnet in Texas
Give it full sun and lean, alkaline, well-drained soil. Match the spot to the plant and most of the battle is already won.
Time your planting to our long warm season and watch the frost dates at both ends; the live weather tool on this site is built for exactly that.
Keep moisture even, especially while it's young — deep, less-frequent soaks build better roots than a daily sprinkle.
Harvesting
Figure on roughly fall sow, spring bloom before you're harvesting.
Making more for free
If you want more, let your healthiest plants mature fully and collect the seed once it's dry on the plant — then store it somewhere cool, dark, and dry until next season.
Part of the free Texas Roots plant database, compiled by Jordan Polasek from his greenhouse in El Campo, Texas. Free to read and share. If it helped, the best thanks is to grow something.