---
title: "Preston Greenhouse — General Contractors | Houzz"
canonical_html_url: https://www.houzz.com/professionals/general-contractors/preston-greenhouse-pfvwus-pf~278024683
markdown_url: https://www.houzz.com/md/professionals/pf~278024683.md
entity_type: LocalBusiness
business_name: "Preston Greenhouse"
category: ["General Contractors"]
image: https://st.hzcdn.com/fimgs/d933899d098db55d_9232-w400-h400-b0-p0--.jpg
address: "Louisville, Kentucky, United States"
latitude: 38.0846
longitude: -85.851
phone: "(502) 969-5655"
website: http://
rating: 0
review_count: 0
followers: 5
last_updated: 2026-09-11
---

# Preston Greenhouse

Original Houzz profile: [Preston Greenhouse](https://www.houzz.com/professionals/general-contractors/preston-greenhouse-pfvwus-pf~278024683)

## Professional summary

- **Primary category:** General Contractors
- **Location:** Louisville, KY
- **Houzz rating:** 0.0 out of 5 (0 reviews)

## About

Preston Greenhouse exists to provide the best service and attitude at every project at every site. We strive to create finished projects that have a lasting, positive effect for our clients. Call us for your next project today!

## Business Details

| Field | Value |
| --- | --- |
| Business Name | Preston Greenhouse |
| Address | Louisville, Kentucky, United States |
| Phone | (502) 969-5655 |
| Website | http:// |
| Followers on Houzz | 5 |

## Contact

- **Houzz profile:** [Preston Greenhouse](https://www.houzz.com/professionals/general-contractors/preston-greenhouse-pfvwus-pf~278024683)
- **Website:** http://
- **Phone:** (502) 969-5655

## Community Q&A

**Q: How early shall I start trying for sweet potato slips?** *(in Plant Propagation)*

I have not had the opportunity to grow sweet potatoes in about 25 years, since we lived in southern Michigan. All of our travels finally have returned us to the wonderful Midwest in our retirement and I once more have a wonderful garden spot ready to go!
I remember that once I had got my sweet potato to start producing sprouts (using the time-honored method of placing the potato, supported by toothpicks, in a container of water), I would allow each sprout to get about 6" long, then remove it to another container of water to grow roots. I kept adding the slips to the second container until I had my desired number of slips for planting.
What I cannot recall is how early to start --or how long I should wait to put my potato in water. I am in central ohio, zone 5, and will be planting in raised beds (15"-18" deep) that are going to need to thaw out before planting. I'll pull off the chopped leaf/grass mulch & use black plastic to warm the soil as soon as things thaw enough (weeks yet!). But I do not want to exhaust my potatoes or have the slips become overgrown before time to plant.
Also, I currently have my "seed" potatoes (I bought a couple of healthy-looking organic potatoes from a Whole Foods store over the holidays)in a dark cellar with about 55% humidity and between 45-50 degrees. Is that too cool? And would it be better to store the potatoes in some barely damp spaghnum moss, sand, peat, or coir until ready to start them?
I'd appreciate any suggestions as to when to start propagating my taters! Many thanks in advance!

CK

A: Sweet potatoes do not like cold ground. For this reason they should be planted after your soil temperatures have warmed up. planting them in raised beds with black plastic covering your beds will certainly help. Also selecting varieties that are early maturing varieties will allow you to plant a little later when the ground is warmer and still make a good crop. For rooted cuttings, 2 weeks or so will give them time to push out new roots. You may take your slips directly from the tubers or you can take tip cuttings from the vine tips. For rooted cuttings a 2" cutting with at least 2 nodes stuck in a half peat half perlite mix and put in a high humidity area under mist and preferably bottom heat. For unrooted cuttings your vine tip cuttings should contain at least 4 nodes (approximately 8-10" long) be sure to trim leaves back to a central stem. One thing to consider is that the tubers over several generations pick up viruses that affect your yields. For this reason all of our plants start out from tissue culture where they are screened for viruses.

**Q: grafting wax what a mess!** *(in Plant Propagation)*

I thought grafting wax would be so easy to use. But it's like the goo on flypaper. It's impossible to manage. I need some pointers.
Jim

Woodinville, WA

A: We use paraffin (the kind you buy at the grocery store for canning jellies and jams.) We use a metal cookie tin and melt the paraffin in the tin on a hot plate with a variable temperature control. We use a foam type paint brush to brush the paraffin on the graft. The trick is to heat the paraffin so when applied to your thumb nail it cools clear and does not burn your thumb. It should be hot but not burn and seal clear. This method is much faster than the paraffin tape. One application of paraffin on either side of the graft and you are ready for the next one.

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*Source: Houzz professional profile. Reflects the profile as of 2026-09-11.*